Begin implementing async subproccesses for windows.

Ore efficient than using a self pipe.

CHANGELOG.md

@@ -1,6 +1,17 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+## Unreleased - ???
+- Deprecate `file/popen` in favor of `os/spawn`.
+- Add `:all` keyword to `ev/read` and `net/read` to make them more like `file/read`. However, we
+  do not provide any `:line` option as that requires buffering.
+- Change repl behavior to make Ctrl-C raise SIGINT on posix. The old behavior for Ctrl-C,
+  to clear the current line buffer, has been moved to Ctrl-Q.
+- Importing modules that start with `/` is now the only way to import from project root.
+  Before, this would import from / on disk.
+- Change hash function for numbers.
+- Improve error handling of `dofile`.
+
 ## 1.13.1 - 2020-12-13
 - Pretty printing a table with a prototype will look for `:_name` instead of `:name`
   in the prototype table to tag the output.

examples/async-execute.janet

@@ -0,0 +1,22 @@
+(defn dowork [name n]
+  (print name " starting work...")
+  (os/execute [(dyn :executable) "-e" (string "(os/sleep " n ")")])
+  (print name " finished work!"))
+
+# Will be done in parallel
+(print "starting group A")
+(ev/call dowork "A 2" 2)
+(ev/call dowork "A 1" 1)
+(ev/call dowork "A 3" 3)
+
+(ev/sleep 4)
+
+# Will also be done in parallel
+(print "starting group B")
+(ev/call dowork "B 2" 2)
+(ev/call dowork "B 1" 1)
+(ev/call dowork "B 3" 3)
+
+(ev/sleep 4)
+
+(print "all work done")

janet.1

@@ -64,6 +64,10 @@ Move cursor to the beginning of input line.
 .BR Ctrl\-B
 Move cursor one character to the left.
 
+.TP 16
+.BR Ctrl\-D
+If on a newline, indicate end of stream and exit the repl.
+
 .TP 16
 .BR Ctrl\-E
 Move cursor to the end of input line.
@@ -100,6 +104,10 @@ Delete one word before the cursor.
 .BR Ctrl\-G
 Show documentation for the current symbol under the cursor.
 
+.TP 16
+.BR Ctrl\-Q
+Clear the current command, including already typed lines.
+
 .TP 16
 .BR Alt\-B/Alt\-F
 Move cursor backwards and forwards one word.

src/boot/boot.janet

@@ -790,36 +790,50 @@
 ###
 ###
 
-(defn- sort-part
-  [a lo hi by]
-  (def pivot (in a hi))
-  (var i lo)
-  (forv j lo hi
-    (def aj (in a j))
-    (when (by aj pivot)
-      (def ai (in a i))
-      (set (a i) aj)
-      (set (a j) ai)
-      (++ i)))
-  (set (a hi) (in a i))
-  (set (a i) pivot)
-  i)
+(defn- median-of-three [a b c]
+  (if (not= (> a b) (> a c))
+    a
+    (if (not= (> b a) (> b c)) b c)))
 
-(defn- sort-help
-  [a lo hi by]
-  (when (> hi lo)
-    (def piv (sort-part a lo hi by))
-    (sort-help a lo (- piv 1) by)
-    (sort-help a (+ piv 1) hi by))
+(defn- insertion-sort [a lo hi by]
+  (for i (+ lo 1) (+ hi 1)
+    (def temp (in a i))
+    (var j (- i 1))
+    (while (and (>= j lo) (by temp (in a j)))
+      (set (a (+ j 1)) (in a j))
+      (-- j))
+
+    (set (a (+ j 1)) temp))
   a)
 
 (defn sort
   "Sort an array in-place. Uses quick-sort and is not a stable sort."
   [a &opt by]
-  (sort-help a 0 (- (length a) 1) (or by <)))
+  (default by <)
+  (def stack @[[0 (- (length a) 1)]])
+  (while (not (empty? stack))
+    (def [lo hi] (array/pop stack))
+    (when (< lo hi)
+      (when (< (- hi lo) 32) (insertion-sort a lo hi by) (break))
+      (def pivot (median-of-three (in a hi) (in a lo) (in a (math/floor (/ (+ lo hi) 2)))))
+      (var left lo)
+      (var right hi)
+      (while true
+        (while (by (in a left) pivot) (++ left))
+        (while (by pivot (in a right)) (-- right))
+        (when (<= left right)
+          (def tmp (in a left))
+          (set (a left) (in a right))
+          (set (a right) tmp)
+          (++ left)
+          (-- right))
+        (if (>= left right) (break)))
+      (array/push stack [lo right])
+      (array/push stack [left hi])))
+  a)
 
-(undef sort-part)
-(undef sort-help)
+(undef median-of-three)
+(undef insertion-sort)
 
 (defn sort-by
   `Returns a new sorted array that compares elements by invoking
@@ -1561,16 +1575,26 @@
 
 (defmacro match
   ```
-  Pattern matching. Match an expression x against
-  any number of cases. Each case is a pattern to match against, followed
-  by an expression to evaluate to if that case is matched. A pattern that is
-  a symbol will match anything, binding x's value to that symbol. An array
-  will match only if all of it's elements match the corresponding elements in
-  x. A table or struct will match if all values match with the corresponding
-  values in x. A tuple pattern will match if it's first element matches, and the following
-  elements are treated as predicates and are true. The last special case is
-  the '_ symbol, which is a wildcard that will match any value without creating a binding.
-  Any other value pattern will only match if it is equal to x.
+  Pattern matching. Match an expression `x` against any number of cases.
+  Each case is a pattern to match against, followed by an expression to
+  evaluate to if that case is matched.  Legal patterns are:
+
+  * symbol -- a pattern that is a symbol will match anything, binding `x`'s
+    value to that symbol.
+
+  * array -- an array will match only if all of its elements match the
+    corresponding elements in `x`.
+
+  * table or struct -- a table or struct will match if all values match with
+    the corresponding values in `x`.
+
+  * tuple -- a tuple pattern will match if its first element matches, and the
+    following elements are treated as predicates and are true.
+
+  * `_` symbol -- the last special case is the `_` symbol, which is a wildcard
+    that will match any value without creating a binding.
+
+  Any other value pattern will only match if it is equal to `x`.
   ```
   [x & cases]
 
@@ -1684,7 +1708,7 @@
     (visit-pattern-2 anda gun preds nil nil pattern)
     # Local unification
     (def unify @[])
-    (each syms b2g 
+    (each syms b2g
       (when (< 1 (length syms))
         (array/push unify [= ;syms])))
     # Global unification
@@ -1706,7 +1730,7 @@
     (if (= :branch el)
       (let [condition (array/pop stack)
             truthy (array/pop stack)
-            if-form ~(if ,condition ,truthy 
+            if-form ~(if ,condition ,truthy
                        ,(case (length stack)
                           0 nil
                           1 (stack 0)
@@ -2416,9 +2440,6 @@
   (default where "<anonymous>")
   (default guard :ydt)
 
-  # Are we done yet?
-  (var going true)
-
   # Evaluate 1 source form in a protected manner
   (defn eval1 [source]
     (def source (if expand (expand source) source))
@@ -2442,7 +2463,7 @@
     (fiber/setenv f env)
     (while (fiber/can-resume? f)
       (def res (resume f resumeval))
-      (when good (when going (set resumeval (onstatus f res))))))
+      (when good (set resumeval (onstatus f res)))))
 
   # Reader version
   (when read
@@ -2467,11 +2488,11 @@
 
   # Loop
   (def buf @"")
-  (while going
+  (var parser-not-done true)
+  (while parser-not-done
     (if (env :exit) (break))
     (buffer/clear buf)
-    (if (= (chunks buf p)
-           :cancel)
+    (if (= (chunks buf p) :cancel)
       (do
         # A :cancel chunk represents a cancelled form in the REPL, so reset.
         (:flush p)
@@ -2482,19 +2503,23 @@
         (def len (length buf))
         (when (= len 0)
           (:eof p)
-          (set going false))
+          (set parser-not-done false))
         (while (> len pindex)
           (+= pindex (p-consume p buf pindex))
           (while (p-has-more p)
-            (eval1 (p-produce p)))
+            (eval1 (p-produce p))
+            (if (env :exit) (break)))
           (when (= (p-status p) :error)
-            (parse-err p where))))))
+            (parse-err p where)
+            (if (env :exit) (break)))))))
 
   # Check final parser state
-  (while (p-has-more p)
-    (eval1 (p-produce p)))
-  (when (= (p-status p) :error)
-    (parse-err p where))
+  (unless (env :exit)
+    (while (p-has-more p)
+      (eval1 (p-produce p))
+      (if (env :exit) (break)))
+    (when (= (p-status p) :error)
+      (parse-err p where)))
 
   (in env :exit-value env))
 
@@ -2593,8 +2618,9 @@
   [image]
   (unmarshal image load-image-dict))
 
-(defn- check-. [x] (if (string/has-prefix? "." x) x))
-(defn- not-check-. [x] (unless (string/has-prefix? "." x) x))
+(defn- check-relative [x] (if (string/has-prefix? "." x) x))
+(defn- check-is-dep [x] (unless (or (string/has-prefix? "/" x) (string/has-prefix? "." x)) x))
+(defn- check-project-relative [x] (if (string/has-prefix? "/" x) x))
 
 (def module/paths
   ```
@@ -2630,12 +2656,12 @@
   (defn- find-prefix
     [pre]
     (or (find-index |(and (string? ($ 0)) (string/has-prefix? pre ($ 0))) module/paths) 0))
-  (def all-index (find-prefix ":all:"))
-  (array/insert module/paths all-index [(string ":all:" ext) loader not-check-.])
+  (def all-index (find-prefix ".:all:"))
+  (array/insert module/paths all-index [(string ".:all:" ext) loader check-project-relative])
   (def sys-index (find-prefix ":sys:"))
-  (array/insert module/paths sys-index [(string ":sys:/:all:" ext) loader not-check-.])
+  (array/insert module/paths sys-index [(string ":sys:/:all:" ext) loader check-is-dep])
   (def curall-index (find-prefix ":cur:/:all:"))
-  (array/insert module/paths curall-index [(string ":cur:/:all:" ext) loader check-.])
+  (array/insert module/paths curall-index [(string ":cur:/:all:" ext) loader check-relative])
   module/paths)
 
 (module/add-paths ":native:" :native)
@@ -2694,8 +2720,9 @@
 
 (undef fexists)
 (undef mod-filter)
-(undef check-.)
-(undef not-check-.)
+(undef check-relative)
+(undef check-project-relative)
+(undef check-is-dep)
 
 (def module/loading
   `Table mapping currently loading modules to true. Used to prevent
@@ -2723,15 +2750,25 @@
   (def spath (string path))
   (put env :current-file (or src (if-not path-is-file spath)))
   (put env :source (or src (if-not path-is-file spath path)))
+  (var exit-error nil)
+  (var exit-fiber nil)
   (defn chunks [buf _] (file/read f 2048 buf))
   (defn bp [&opt x y]
-    (def ret (bad-parse x y))
-    (if exit (os/exit 1))
-    ret)
+    (when exit
+      (bad-parse x y)
+      (os/exit 1))
+    (put env :exit true)
+    (def [line col] (:where x))
+    (def pe (string (:error x) " in " y " around line " line ", column " col))
+    (set exit-error pe))
   (defn bc [&opt x y z]
-    (def ret (bad-compile x y z))
-    (if exit (os/exit 1))
-    ret)
+    (when exit
+      (bad-compile x y z)
+      (os/exit 1))
+    (put env :exit true)
+    (def ce (string x " while compiling " z))
+    (set exit-error ce)
+    (set exit-fiber y))
   (unless f
     (error (string "could not find file " path)))
   (def nenv
@@ -2741,32 +2778,40 @@
                   :on-compile-error bc
                   :on-status (fn [f x]
                                (when (not= (fiber/status f) :dead)
-                                 (debug/stacktrace f x)
-                                 (if exit (os/exit 1) (eflush))))
+                                 (when exit
+                                   (debug/stacktrace f x)
+                                   (eflush)
+                                   (os/exit 1))
+                                 (put env :exit true)
+                                 (set exit-error x)
+                                 (set exit-fiber f)))
                   :evaluator evaluator
                   :expander expander
                   :read read
                   :parser parser
                   :source (or src (if path-is-file "<anonymous>" spath))}))
   (if-not path-is-file (file/close f))
+  (when exit-error
+    (if exit-fiber
+      (propagate exit-error exit-fiber)
+      (error exit-error)))
   nenv)
 
 (def module/loaders
   `A table of loading method names to loading functions.
   This table lets require and import load many different kinds
   of files as modules.`
-  @{:native (fn [path &] (native path (make-env)))
-    :source (fn [path args]
+  @{:native (fn native-loader [path &] (native path (make-env)))
+    :source (fn source-loader [path args]
               (put module/loading path true)
-              (def newenv (dofile path ;args))
-              (put module/loading path nil)
-              newenv)
-    :preload (fn [path & args]
+              (defer (put module/loading path nil)
+                (dofile path ;args)))
+    :preload (fn preload-loader [path & args]
                (when-let [m (in module/cache path)]
                  (if (function? m)
                    (set (module/cache path) (m path ;args))
                    m)))
-    :image (fn [path &] (load-image (slurp path)))})
+    :image (fn image-loader [path &] (load-image (slurp path)))})
 
 (defn require-1
   [path args kargs]

src/conf/janetconf.h

@@ -5,9 +5,9 @@
 
 #define JANET_VERSION_MAJOR 1
 #define JANET_VERSION_MINOR 13
-#define JANET_VERSION_PATCH 1
-#define JANET_VERSION_EXTRA ""
-#define JANET_VERSION "1.13.1"
+#define JANET_VERSION_PATCH 2
+#define JANET_VERSION_EXTRA "-dev"
+#define JANET_VERSION "1.13.2-dev"
 
 /* #define JANET_BUILD "local" */
 

src/core/ev.c

@@ -31,12 +31,12 @@
 
 #ifdef JANET_EV
 
-/* Includes */
 #include <math.h>
 #ifdef JANET_WINDOWS
 #include <winsock2.h>
 #include <windows.h>
 #else
+#include <pthread.h>
 #include <limits.h>
 #include <errno.h>
 #include <unistd.h>
@@ -48,6 +48,7 @@
 #include <netinet/tcp.h>
 #include <netdb.h>
 #include <sys/socket.h>
+#include <sys/wait.h>
 #ifdef JANET_EV_EPOLL
 #include <sys/epoll.h>
 #include <sys/timerfd.h>
@@ -148,6 +149,7 @@ JANET_THREAD_LOCAL JanetRNG janet_vm_ev_rng;
 JANET_THREAD_LOCAL JanetListenerState **janet_vm_listeners = NULL;
 JANET_THREAD_LOCAL size_t janet_vm_listener_count = 0;
 JANET_THREAD_LOCAL size_t janet_vm_listener_cap = 0;
+JANET_THREAD_LOCAL size_t janet_vm_extra_listeners = 0;
 
 /* Get current timestamp (millisecond precision) */
 static JanetTimestamp ts_now(void);
@@ -519,6 +521,7 @@ void janet_ev_init_common(void) {
 /* Common deinit code */
 void janet_ev_deinit_common(void) {
     janet_q_deinit(&janet_vm_spawn);
+    free(janet_vm_tq);
     free(janet_vm_listeners);
     janet_vm_listeners = NULL;
 }
@@ -540,6 +543,14 @@ void janet_addtimeout(double sec) {
     add_timeout(to);
 }
 
+void janet_ev_inc_refcount(void) {
+    janet_vm_extra_listeners++;
+}
+
+void janet_ev_dec_refcount(void) {
+    janet_vm_extra_listeners--;
+}
+
 /* Channels */
 
 typedef struct {
@@ -839,14 +850,16 @@ void janet_loop1(void) {
             }
         }
     }
+
     /* Run scheduled fibers */
     while (janet_vm_spawn.head != janet_vm_spawn.tail) {
         JanetTask task = {NULL, janet_wrap_nil(), JANET_SIGNAL_OK};
         janet_q_pop(&janet_vm_spawn, &task, sizeof(task));
         run_one(task.fiber, task.value, task.sig);
     }
+
     /* Poll for events */
-    if (janet_vm_listener_count || janet_vm_tq_count) {
+    if (janet_vm_listener_count || janet_vm_tq_count || janet_vm_extra_listeners) {
         JanetTimeout to;
         memset(&to, 0, sizeof(to));
         int has_timeout;
@@ -855,18 +868,69 @@ void janet_loop1(void) {
             pop_timeout(0);
         }
         /* Run polling implementation only if pending timeouts or pending events */
-        if (janet_vm_tq_count || janet_vm_listener_count) {
+        if (janet_vm_tq_count || janet_vm_listener_count || janet_vm_extra_listeners) {
             janet_loop1_impl(has_timeout, to.when);
         }
     }
 }
 
 void janet_loop(void) {
-    while (janet_vm_listener_count || (janet_vm_spawn.head != janet_vm_spawn.tail) || janet_vm_tq_count) {
+    while (janet_vm_listener_count || (janet_vm_spawn.head != janet_vm_spawn.tail) || janet_vm_tq_count || janet_vm_extra_listeners) {
         janet_loop1();
     }
 }
 
+/*
+ * Self-pipe handling code.
+ */
+
+/* Wrap return value by pairing it with the callback used to handle it
+ * in the main thread */
+typedef struct {
+    JanetEVGenericMessage msg;
+    JanetThreadedCallback cb;
+} JanetSelfPipeEvent;
+
+/* Structure used to initialize threads in the thread pool
+ * (same head structure as self pipe event)*/
+typedef struct {
+    JanetEVGenericMessage msg;
+    JanetThreadedCallback cb;
+    JanetThreadedSubroutine subr;
+    JanetHandle write_pipe;
+} JanetEVThreadInit;
+
+#ifdef JANET_WINDOWS
+
+/* On windows, use PostQueuedCompletionStatus instead for
+ * custom events */
+
+#else
+
+static JANET_THREAD_LOCAL JanetHandle janet_vm_selfpipe[2];
+
+static void janet_ev_setup_selfpipe(void) {
+    if (janet_make_pipe(janet_vm_selfpipe)) {
+        JANET_EXIT("failed to initialize self pipe in event loop");
+    }
+}
+
+/* Handle events from the self pipe inside the event loop */
+static void janet_ev_handle_selfpipe(void) {
+    JanetSelfPipeEvent response;
+    while (read(janet_vm_selfpipe[0], &response, sizeof(response)) > 0) {
+        response.cb(response.msg);
+        janet_ev_dec_refcount();
+    }
+}
+
+static void janet_ev_cleanup_selfpipe(void) {
+    close(janet_vm_selfpipe[0]);
+    close(janet_vm_selfpipe[1]);
+}
+
+#endif
+
 #ifdef JANET_WINDOWS
 
 JANET_THREAD_LOCAL HANDLE janet_vm_iocp = NULL;
@@ -926,6 +990,12 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp to) {
         if (!has_timeout) {
             /* queue emptied */
         }
+    } else if (0 == completionKey) {
+        /* Custom event */
+        JanetSelfPipeEvent *response = (JanetSelfPipeEvent *)(overlapped);
+        response->cb(response->msg);
+        free(response);
+        janet_ev_dec_refcount();
     } else {
         /* Normal event */
         JanetStream *stream = (JanetStream *) completionKey;
@@ -1034,8 +1104,14 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp timeout) {
 
     /* Step state machines */
     for (int i = 0; i < ready; i++) {
-        JanetStream *stream = events[i].data.ptr;
-        if (NULL != stream) { /* If NULL, is a timeout */
+        void *p = events[i].data.ptr;
+        if (&janet_vm_timerfd == p) {
+            /* Timer expired, ignore */;
+        } else if (janet_vm_selfpipe == p) {
+            /* Self-pipe handling */
+            janet_ev_handle_selfpipe();
+        } else {
+            JanetStream *stream = p;
             int mask = events[i].events;
             JanetListenerState *state = stream->state;
             state->event = events + i;
@@ -1066,14 +1142,18 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp timeout) {
 
 void janet_ev_init(void) {
     janet_ev_init_common();
+    janet_ev_setup_selfpipe();
     janet_vm_epoll = epoll_create1(EPOLL_CLOEXEC);
     janet_vm_timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK);
     janet_vm_timer_enabled = 0;
     if (janet_vm_epoll == -1 || janet_vm_timerfd == -1) goto error;
     struct epoll_event ev;
     ev.events = EPOLLIN | EPOLLET;
-    ev.data.ptr = NULL;
+    ev.data.ptr = &janet_vm_timerfd;
     if (-1 == epoll_ctl(janet_vm_epoll, EPOLL_CTL_ADD, janet_vm_timerfd, &ev)) goto error;
+    ev.events = EPOLLIN | EPOLLET;
+    ev.data.ptr = janet_vm_selfpipe;
+    if (-1 == epoll_ctl(janet_vm_epoll, EPOLL_CTL_ADD, janet_vm_selfpipe[0], &ev)) goto error;
     return;
 error:
     JANET_EXIT("failed to initialize event loop");
@@ -1083,6 +1163,7 @@ void janet_ev_deinit(void) {
     janet_ev_deinit_common();
     close(janet_vm_epoll);
     close(janet_vm_timerfd);
+    janet_ev_cleanup_selfpipe();
     janet_vm_epoll = 0;
 }
 
@@ -1119,7 +1200,7 @@ JanetListenerState *janet_listen(JanetStream *stream, JanetListener behavior, in
     JanetListenerState *state = janet_listen_impl(stream, behavior, mask, size, user);
     size_t newsize = janet_vm_listener_cap;
     if (newsize > oldsize) {
-        janet_vm_fds = realloc(janet_vm_fds, newsize * sizeof(struct pollfd));
+        janet_vm_fds = realloc(janet_vm_fds, (newsize + 1) * sizeof(struct pollfd));
         if (NULL == janet_vm_fds) {
             JANET_OUT_OF_MEMORY;
         }
@@ -1128,12 +1209,12 @@ JanetListenerState *janet_listen(JanetStream *stream, JanetListener behavior, in
     ev.fd = stream->handle;
     ev.events = make_poll_events(state->stream->_mask);
     ev.revents = 0;
-    janet_vm_fds[state->_index] = ev;
+    janet_vm_fds[state->_index + 1] = ev;
     return state;
 }
 
 static void janet_unlisten(JanetListenerState *state) {
-    janet_vm_fds[state->_index] = janet_vm_fds[janet_vm_listener_count - 1];
+    janet_vm_fds[state->_index + 1] = janet_vm_fds[janet_vm_listener_count];
     janet_unlisten_impl(state);
 }
 
@@ -1146,19 +1227,25 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp timeout) {
             JanetTimestamp now = ts_now();
             to = now > timeout ? 0 : (int)(timeout - now);
         }
-        ready = poll(janet_vm_fds, janet_vm_listener_count, to);
+        ready = poll(janet_vm_fds, janet_vm_listener_count + 1, to);
     } while (ready == -1 && errno == EINTR);
     if (ready == -1) {
         JANET_EXIT("failed to poll events");
     }
 
+    /* Check selfpipe */
+    if (janet_vm_fds[0].revents & POLLIN) {
+        janet_vm_fds[0].revents = 0;
+        janet_ev_handle_selfpipe();
+    }
+
     /* Step state machines */
     for (size_t i = 0; i < janet_vm_listener_count; i++) {
-        struct pollfd *pfd = janet_vm_fds + i;
+        struct pollfd *pfd = janet_vm_fds + i + 1;
         /* Skip fds where nothing interesting happened */
         JanetListenerState *state = janet_vm_listeners[i];
         /* Normal event */
-        int mask = janet_vm_fds[i].revents;
+        int mask = pfd->revents;
         JanetAsyncStatus status1 = JANET_ASYNC_STATUS_NOT_DONE;
         JanetAsyncStatus status2 = JANET_ASYNC_STATUS_NOT_DONE;
         JanetAsyncStatus status3 = JANET_ASYNC_STATUS_NOT_DONE;
@@ -1183,20 +1270,157 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp timeout) {
 void janet_ev_init(void) {
     janet_ev_init_common();
     janet_vm_fds = NULL;
+    janet_ev_setup_selfpipe();
+    janet_vm_fds = malloc(sizeof(struct pollfd));
+    if (NULL == janet_vm_fds) {
+        JANET_OUT_OF_MEMORY;
+    }
+    janet_vm_fds[0].fd = janet_vm_selfpipe[0];
+    janet_vm_fds[0].events = POLLIN;
+    janet_vm_fds[0].revents = 0;
     return;
 }
 
 void janet_ev_deinit(void) {
     janet_ev_deinit_common();
+    janet_ev_cleanup_selfpipe();
     free(janet_vm_fds);
     janet_vm_fds = NULL;
 }
 
 #endif
 
-/* C API helpers for reading and writing from streams.
+/*
+ * End poll implementation
+ */
+
+/*
+ * Threaded calls
+ */
+
+#ifdef JANET_WINDOWS
+static DWORD WINAPI janet_thread_body(LPVOID ptr) {
+    JanetEVThreadInit *init = (JanetEVThreadInit *)ptr;
+    JanetEVGenericMessage msg = init->msg;
+    JanetThreadedSubroutine subr = init->subr;
+    JanetThreadedCallback cb = init->cb;
+    JanetHandle iocp = init->write_pipe;
+    /* Reuse memory from thread init for returning data */
+    init->msg = subr(msg);
+    init->cb = cb;
+    janet_assert(PostQueuedCompletionStatus(iocp,
+                                            sizeof(JanetSelfPipeEvent),
+                                            0,
+                                            (LPOVERLAPPED) init),
+                 "failed to post completion event");
+    return 0;
+}
+#else
+static void *janet_thread_body(void *ptr) {
+    JanetEVThreadInit *init = (JanetEVThreadInit *)ptr;
+    JanetEVGenericMessage msg = init->msg;
+    JanetThreadedSubroutine subr = init->subr;
+    JanetThreadedCallback cb = init->cb;
+    int fd = init->write_pipe;
+    free(init);
+    JanetSelfPipeEvent response;
+    response.msg = subr(msg);
+    response.cb = cb;
+    /* handle a bit of back pressure before giving up. */
+    int tries = 4;
+    while (tries > 0) {
+        int status;
+        do {
+            status = write(fd, &response, sizeof(response));
+        } while (status == -1 && errno == EINTR);
+        if (status > 0) break;
+        sleep(1);
+        tries--;
+    }
+    return NULL;
+}
+#endif
+
+void janet_ev_threaded_call(JanetThreadedSubroutine fp, JanetEVGenericMessage arguments, JanetThreadedCallback cb) {
+    JanetEVThreadInit *init = malloc(sizeof(JanetEVThreadInit));
+    if (NULL == init) {
+        JANET_OUT_OF_MEMORY;
+    }
+    init->msg = arguments;
+    init->subr = fp;
+    init->cb = cb;
+
+#ifdef JANET_WINDOWS
+    init->write_pipe = janet_vm_iocp;
+    HANDLE thread_handle = CreateThread(NULL, 0, janet_thread_body, init, 0, NULL);
+    if (NULL == thread_handle) {
+        free(init);
+        janet_panic("failed to create thread");
+    }
+    CloseHandle(thread_handle); /* detach from thread */
+#else
+    init->write_pipe = janet_vm_selfpipe[1];
+    pthread_t waiter_thread;
+    int err = pthread_create(&waiter_thread, NULL, janet_thread_body, init);
+    if (err) {
+        free(init);
+        janet_panicf("%s", strerror(err));
+    }
+    pthread_detach(waiter_thread);
+#endif
+
+    /* Increment ev refcount so we don't quit while waiting for a subprocess */
+    janet_ev_inc_refcount();
+}
+
+/* Default callback for janet_ev_threaded_await. */
+void janet_ev_default_threaded_callback(JanetEVGenericMessage return_value) {
+    switch (return_value.tag) {
+        default:
+        case JANET_EV_TCTAG_NIL:
+            janet_schedule(return_value.fiber, janet_wrap_nil());
+            break;
+        case JANET_EV_TCTAG_INTEGER:
+            janet_schedule(return_value.fiber, janet_wrap_integer(return_value.argi));
+            break;
+        case JANET_EV_TCTAG_STRING:
+        case JANET_EV_TCTAG_STRINGF:
+            janet_schedule(return_value.fiber, janet_cstringv((const char *) return_value.argp));
+            if (return_value.tag == JANET_EV_TCTAG_STRINGF) free(return_value.argp);
+            break;
+        case JANET_EV_TCTAG_KEYWORD:
+            janet_schedule(return_value.fiber, janet_ckeywordv((const char *) return_value.argp));
+            break;
+        case JANET_EV_TCTAG_ERR_STRING:
+        case JANET_EV_TCTAG_ERR_STRINGF:
+            janet_cancel(return_value.fiber, janet_cstringv((const char *) return_value.argp));
+            if (return_value.tag == JANET_EV_TCTAG_STRINGF) free(return_value.argp);
+            break;
+        case JANET_EV_TCTAG_ERR_KEYWORD:
+            janet_cancel(return_value.fiber, janet_ckeywordv((const char *) return_value.argp));
+            break;
+    }
+    janet_gcunroot(janet_wrap_fiber(return_value.fiber));
+}
+
+
+/* Convenience method for common case */
+void janet_ev_threaded_await(JanetThreadedSubroutine fp, int tag, int argi, void *argp) {
+    JanetEVGenericMessage arguments;
+    arguments.tag = tag;
+    arguments.argi = argi;
+    arguments.argp = argp;
+    arguments.fiber = janet_root_fiber();
+    janet_gcroot(janet_wrap_fiber(arguments.fiber));
+    janet_ev_threaded_call(fp, arguments, janet_ev_default_threaded_callback);
+    janet_await();
+}
+
+/*
+ * C API helpers for reading and writing from streams.
  * There is some networking code in here as well as generic
- * reading and writing primitives. */
+ * reading and writing primitives.
+ */
 
 void janet_stream_flags(JanetStream *stream, uint32_t flags) {
     if (stream->flags & JANET_STREAM_CLOSED) {
@@ -1297,7 +1521,7 @@ JanetAsyncStatus ev_machine_read(JanetListenerState *s, JanetAsyncEvent event) {
             janet_buffer_push_bytes(state->buf, state->chunk_buf, s->bytes);
             state->bytes_left -= s->bytes;
 
-            if (state->bytes_left <= 0 || !state->is_chunk || s->bytes == 0) {
+            if (state->bytes_left == 0 || !state->is_chunk || s->bytes == 0) {
                 Janet resume_val;
 #ifdef JANET_NET
                 if (state->mode == JANET_ASYNC_READMODE_RECVFROM) {
@@ -1360,12 +1584,11 @@ JanetAsyncStatus ev_machine_read(JanetListenerState *s, JanetAsyncEvent event) {
             }
             return JANET_ASYNC_STATUS_DONE;
         }
-        case JANET_ASYNC_EVENT_READ:
-            /* Read in bytes */
-        {
+        case JANET_ASYNC_EVENT_READ: {
             JanetBuffer *buffer = state->buf;
             int32_t bytes_left = state->bytes_left;
-            janet_buffer_extra(buffer, bytes_left);
+            int32_t read_limit = bytes_left < 0 ? 4096 : bytes_left;
+            janet_buffer_extra(buffer, read_limit);
             ssize_t nread;
 #ifdef JANET_NET
             char saddr[256];
@@ -1374,14 +1597,14 @@ JanetAsyncStatus ev_machine_read(JanetListenerState *s, JanetAsyncEvent event) {
             do {
 #ifdef JANET_NET
                 if (state->mode == JANET_ASYNC_READMODE_RECVFROM) {
-                    nread = recvfrom(s->stream->handle, buffer->data + buffer->count, bytes_left, state->flags,
+                    nread = recvfrom(s->stream->handle, buffer->data + buffer->count, read_limit, state->flags,
                                      (struct sockaddr *)&saddr, &socklen);
                 } else if (state->mode == JANET_ASYNC_READMODE_RECV) {
-                    nread = recv(s->stream->handle, buffer->data + buffer->count, bytes_left, state->flags);
+                    nread = recv(s->stream->handle, buffer->data + buffer->count, read_limit, state->flags);
                 } else
 #endif
                 {
-                    nread = read(s->stream->handle, buffer->data + buffer->count, bytes_left);
+                    nread = read(s->stream->handle, buffer->data + buffer->count, read_limit);
                 }
             } while (nread == -1 && errno == EINTR);
 
@@ -1731,7 +1954,13 @@ int janet_make_pipe(JanetHandle handles[2]) {
     return 0;
 #else
     if (pipe(handles)) return -1;
+    if (fcntl(handles[0], F_SETFL, O_NONBLOCK)) goto error;
+    if (fcntl(handles[1], F_SETFL, O_NONBLOCK)) goto error;
     return 0;
+error:
+    close(handles[0]);
+    close(handles[1]);
+    return -1;
 #endif
 }
 
@@ -1756,9 +1985,7 @@ static Janet cfun_ev_call(int32_t argc, Janet *argv) {
     return janet_wrap_fiber(fiber);
 }
 
-static Janet cfun_ev_sleep(int32_t argc, Janet *argv) {
-    janet_fixarity(argc, 1);
-    double sec = janet_getnumber(argv, 0);
+JANET_NO_RETURN void janet_sleep_await(double sec) {
     JanetTimeout to;
     to.when = ts_delta(ts_now(), sec);
     to.fiber = janet_vm_root_fiber;
@@ -1769,6 +1996,12 @@ static Janet cfun_ev_sleep(int32_t argc, Janet *argv) {
     janet_await();
 }
 
+static Janet cfun_ev_sleep(int32_t argc, Janet *argv) {
+    janet_fixarity(argc, 1);
+    double sec = janet_getnumber(argv, 0);
+    janet_sleep_await(sec);
+}
+
 static Janet cfun_ev_deadline(int32_t argc, Janet *argv) {
     janet_arity(argc, 1, 3);
     double sec = janet_getnumber(argv, 0);
@@ -1803,11 +2036,16 @@ Janet janet_cfun_stream_read(int32_t argc, Janet *argv) {
     janet_arity(argc, 2, 4);
     JanetStream *stream = janet_getabstract(argv, 0, &janet_stream_type);
     janet_stream_flags(stream, JANET_STREAM_READABLE);
-    int32_t n = janet_getnat(argv, 1);
     JanetBuffer *buffer = janet_optbuffer(argv, argc, 2, 10);
     double to = janet_optnumber(argv, argc, 3, INFINITY);
-    if (to != INFINITY) janet_addtimeout(to);
-    janet_ev_read(stream, buffer, n);
+    if (janet_keyeq(argv[1], "all")) {
+        if (to != INFINITY) janet_addtimeout(to);
+        janet_ev_readchunk(stream, buffer, -1);
+    } else {
+        int32_t n = janet_getnat(argv, 1);
+        if (to != INFINITY) janet_addtimeout(to);
+        janet_ev_read(stream, buffer, n);
+    }
     janet_await();
 }
 
@@ -1922,7 +2160,8 @@ static const JanetReg ev_cfuns[] = {
     {
         "ev/read", janet_cfun_stream_read,
         JDOC("(ev/read stream n &opt buffer timeout)\n\n"
-             "Read up to n bytes into a buffer asynchronously from a stream. "
+             "Read up to n bytes into a buffer asynchronously from a stream. `n` can also be the keyword "
+             "`:all` to read into the buffer until end of stream. "
              "Optionally provide a buffer to write into "
              "as well as a timeout in seconds after which to cancel the operation and raise an error. "
              "Returns the buffer if the read was successful or nil if end-of-stream reached. Will raise an "

src/core/io.c

@@ -777,7 +777,7 @@ static const JanetReg io_cfuns[] = {
 #ifndef JANET_NO_PROCESSES
     {
         "file/popen", cfun_io_popen,
-        JDOC("(file/popen command &opt mode)\n\n"
+        JDOC("(file/popen command &opt mode) (DEPRECATED for os/spawn)\n\n"
              "Open a file that is backed by a process. The file must be opened in either "
              "the :r (read) or the :w (write) mode. In :r mode, the stdout of the "
              "process can be read from the file. In :w mode, the stdin of the process "

src/core/net.c

@@ -509,11 +509,16 @@ static Janet cfun_stream_read(int32_t argc, Janet *argv) {
     janet_arity(argc, 2, 4);
     JanetStream *stream = janet_getabstract(argv, 0, &janet_stream_type);
     janet_stream_flags(stream, JANET_STREAM_READABLE | JANET_STREAM_SOCKET);
-    int32_t n = janet_getnat(argv, 1);
     JanetBuffer *buffer = janet_optbuffer(argv, argc, 2, 10);
     double to = janet_optnumber(argv, argc, 3, INFINITY);
-    if (to != INFINITY) janet_addtimeout(to);
-    janet_ev_recv(stream, buffer, n, MSG_NOSIGNAL);
+    if (janet_keyeq(argv[1], "all")) {
+        if (to != INFINITY) janet_addtimeout(to);
+        janet_ev_recvchunk(stream, buffer, -1, MSG_NOSIGNAL);
+    } else {
+        int32_t n = janet_getnat(argv, 1);
+        if (to != INFINITY) janet_addtimeout(to);
+        janet_ev_recv(stream, buffer, n, MSG_NOSIGNAL);
+    }
     janet_await();
 }
 
@@ -643,6 +648,7 @@ static const JanetReg net_cfuns[] = {
         "net/read", cfun_stream_read,
         JDOC("(net/read stream nbytes &opt buf timeout)\n\n"
              "Read up to n bytes from a stream, suspending the current fiber until the bytes are available. "
+             "`n` can also be the keyword `:all` to read into the buffer until end of stream. "
              "If less than n bytes are available (and more than 0), will push those bytes and return early. "
              "Takes an optional timeout in seconds, after which will return nil. "
              "Returns a buffer with up to n more bytes in it, or raises an error if the read failed.")

src/core/os.c

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2020 Calvin Rose
+* Copyright (c) 2021 Calvin Rose
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
@@ -185,6 +185,7 @@ static Janet os_exit(int32_t argc, Janet *argv) {
 #ifndef JANET_REDUCED_OS
 
 #ifndef JANET_NO_PROCESSES
+
 /* Get env for os_execute */
 static char **os_execute_env(int32_t argc, const Janet *argv) {
     char **envp = NULL;
@@ -319,13 +320,15 @@ static JanetBuffer *os_exec_escape(JanetView args) {
 static const JanetAbstractType ProcAT;
 #define JANET_PROC_CLOSED 1
 #define JANET_PROC_WAITED 2
+#define JANET_PROC_WAITING 4
+#define JANET_PROC_ERROR_NONZERO 8
 typedef struct {
     int flags;
 #ifdef JANET_WINDOWS
     HANDLE pHandle;
     HANDLE tHandle;
 #else
-    int pid;
+    pid_t pid;
 #endif
     int return_code;
 #ifdef JANET_EV
@@ -339,6 +342,62 @@ typedef struct {
 #endif
 } JanetProc;
 
+#ifdef JANET_EV
+
+#ifdef JANET_WINDOWS
+
+static JanetEVGenericMessage janet_proc_wait_subr(JanetEVGenericMessage args) {
+    JanetProc *proc = (JanetProc *) args.argp;
+    WaitForSingleObject(proc->pHandle, INFINITE);
+    GetExitCodeProcess(proc->pHandle, &args.argi);
+    return args;
+}
+
+#else /* windows check */
+
+/* Function that is called in separate thread to wait on a pid */
+static JanetEVGenericMessage janet_proc_wait_subr(JanetEVGenericMessage args) {
+    JanetProc *proc = (JanetProc *) args.argp;
+    pid_t result;
+    int status = 0;
+    do {
+        result = waitpid(proc->pid, &status, 0);
+    } while (result == -1 && errno == EINTR);
+    /* Use POSIX shell semantics for interpreting signals */
+    if (WIFEXITED(status)) {
+        status = WEXITSTATUS(status);
+    } else if (WIFSTOPPED(status)) {
+        status = WSTOPSIG(status) + 128;
+    } else {
+        status = WTERMSIG(status) + 128;
+    }
+    args.argi = status;
+    return args;
+}
+
+#endif /* End windows check */
+
+/* Callback that is called in main thread when subroutine completes. */
+static void janet_proc_wait_cb(JanetEVGenericMessage args) {
+    int status = args.argi;
+    JanetProc *proc = (JanetProc *) args.argp;
+    if (NULL != proc) {
+        proc->return_code = (int32_t) status;
+        proc->flags |= JANET_PROC_WAITED;
+        proc->flags &= ~JANET_PROC_WAITING;
+        janet_gcunroot(janet_wrap_abstract(proc));
+        janet_gcunroot(janet_wrap_fiber(args.fiber));
+        if ((status != 0) && (proc->flags & JANET_PROC_ERROR_NONZERO)) {
+            JanetString s = janet_formatc("command failed with non-zero exit code %d", status);
+            janet_cancel(args.fiber, janet_wrap_string(s));
+        } else {
+            janet_schedule(args.fiber, janet_wrap_integer(status));
+        }
+    }
+}
+
+#endif /* End ev check */
+
 static int janet_proc_gc(void *p, size_t s) {
     (void) s;
     JanetProc *proc = (JanetProc *) p;
@@ -367,10 +426,26 @@ static int janet_proc_mark(void *p, size_t s) {
     return 0;
 }
 
+#ifdef JANET_EV
+JANET_NO_RETURN
+#endif
 static Janet os_proc_wait_impl(JanetProc *proc) {
-    if (proc->flags & JANET_PROC_WAITED) {
-        janet_panicf("cannot wait on process that has already finished");
+    if (proc->flags & (JANET_PROC_WAITED | JANET_PROC_WAITING)) {
+        janet_panicf("cannot wait twice on a process");
     }
+#ifdef JANET_EV
+    /* Event loop implementation - threaded call */
+    proc->flags |= JANET_PROC_WAITING;
+    JanetEVGenericMessage targs;
+    memset(&targs, 0, sizeof(targs));
+    targs.argp = proc;
+    targs.fiber = janet_root_fiber();
+    janet_gcroot(janet_wrap_abstract(proc));
+    janet_gcroot(janet_wrap_fiber(targs.fiber));
+    janet_ev_threaded_call(janet_proc_wait_subr, targs, janet_proc_wait_cb);
+    janet_await();
+#else
+    /* Non evented implementation */
     proc->flags |= JANET_PROC_WAITED;
     int status = 0;
 #ifdef JANET_WINDOWS
@@ -386,6 +461,7 @@ static Janet os_proc_wait_impl(JanetProc *proc) {
 #endif
     proc->return_code = (int32_t) status;
     return janet_wrap_integer(proc->return_code);
+#endif
 }
 
 static Janet os_proc_wait(int32_t argc, Janet *argv) {
@@ -481,7 +557,7 @@ static int janet_proc_get(void *p, Janet key, Janet *out) {
         return 1;
     }
     if (janet_keyeq(key, "err")) {
-        *out = (NULL == proc->out) ? janet_wrap_nil() : janet_wrap_abstract(proc->err);
+        *out = (NULL == proc->err) ? janet_wrap_nil() : janet_wrap_abstract(proc->err);
         return 1;
     }
     if ((-1 != proc->return_code) && janet_keyeq(key, "return-code")) {
@@ -575,7 +651,7 @@ static JanetFile *get_stdio_for_handle(JanetHandle handle, void *orig, int iswri
 }
 #endif
 
-static Janet os_execute_impl(int32_t argc, Janet *argv, int is_async) {
+static Janet os_execute_impl(int32_t argc, Janet *argv, int is_spawn) {
     janet_arity(argc, 1, 3);
 
     /* Get flags */
@@ -713,7 +789,7 @@ static Janet os_execute_impl(int32_t argc, Janet *argv, int is_async) {
     tHandle = processInfo.hThread;
 
     /* Wait and cleanup immedaitely */
-    if (!is_async) {
+    if (!is_spawn) {
         DWORD code;
         WaitForSingleObject(pHandle, INFINITE);
         GetExitCodeProcess(pHandle, &code);
@@ -781,45 +857,51 @@ static Janet os_execute_impl(int32_t argc, Janet *argv, int is_async) {
     if (status) {
         os_execute_cleanup(envp, child_argv);
         janet_panicf("%p: %s", argv[0], strerror(errno));
-    } else if (is_async) {
+    } else if (is_spawn) {
         /* Get process handle */
         os_execute_cleanup(envp, child_argv);
     } else {
         /* Wait to complete */
-        waitpid(pid, &status, 0);
         os_execute_cleanup(envp, child_argv);
-        /* Use POSIX shell semantics for interpreting signals */
-        if (WIFEXITED(status)) {
-            status = WEXITSTATUS(status);
-        } else if (WIFSTOPPED(status)) {
-            status = WSTOPSIG(status) + 128;
-        } else {
-            status = WTERMSIG(status) + 128;
-        }
     }
 
 #endif
-    if (is_async) {
-        JanetProc *proc = janet_abstract(&ProcAT, sizeof(JanetProc));
-        proc->return_code = -1;
+    JanetProc *proc = janet_abstract(&ProcAT, sizeof(JanetProc));
+    proc->return_code = -1;
 #ifdef JANET_WINDOWS
-        proc->pHandle = pHandle;
-        proc->tHandle = tHandle;
+    proc->pHandle = pHandle;
+    proc->tHandle = tHandle;
 #else
-        proc->pid = pid;
+    proc->pid = pid;
 #endif
-        proc->in = get_stdio_for_handle(new_in, orig_in, 1);
-        proc->out = get_stdio_for_handle(new_out, orig_out, 0);
-        proc->err = get_stdio_for_handle(new_err, orig_err, 0);
-        proc->flags = 0;
-        if (proc->in == NULL || proc->out == NULL || proc->err == NULL) {
-            janet_panic("failed to construct proc");
-        }
+    proc->in = NULL;
+    proc->out = NULL;
+    proc->err = NULL;
+    if (new_in != JANET_HANDLE_NONE) {
+        proc->in = get_stdio_for_handle(new_in, orig_in, 0);
+        if (NULL == proc->in) janet_panic("failed to construct proc");
+    }
+    if (new_out != JANET_HANDLE_NONE) {
+        proc->out = get_stdio_for_handle(new_out, orig_out, 1);
+        if (NULL == proc->out) janet_panic("failed to construct proc");
+    }
+    if (new_err != JANET_HANDLE_NONE) {
+        proc->err = get_stdio_for_handle(new_err, orig_err, 1);
+        if (NULL == proc->err) janet_panic("failed to construct proc");
+    }
+    proc->flags = 0;
+    if (janet_flag_at(flags, 2)) {
+        proc->flags |= JANET_PROC_ERROR_NONZERO;
+    }
+
+    if (is_spawn) {
         return janet_wrap_abstract(proc);
-    } else if (janet_flag_at(flags, 2) && status) {
-        janet_panicf("command failed with non-zero exit code %d", status);
     } else {
-        return janet_wrap_integer(status);
+#ifdef JANET_EV
+        os_proc_wait_impl(proc);
+#else
+        return os_proc_wait_impl(proc);
+#endif
     }
 }
 
@@ -2037,25 +2119,25 @@ static const JanetReg os_cfuns[] = {
              "mode should be a file mode as passed to os/chmod, but only if the create flag is given. "
              "The default mode is 8r666. "
              "Allowed flags are as follows:\n\n"
-             "\t:r - open this file for reading\n"
-             "\t:w - open this file for writing\n"
-             "\t:c - create a new file (O_CREATE)\n"
-             "\t:e - fail if the file exists (O_EXCL)\n"
-             "\t:t - shorten an existing file to length 0 (O_TRUNC)\n\n"
-             "Posix only flags:\n"
-             "\t:a - append to a file (O_APPEND)\n"
-             "\t:x - O_SYNC\n"
-             "\t:C - O_NOCTTY\n\n"
-             "Windows only flags:\n"
-             "\t:R - share reads (FILE_SHARE_READ)\n"
-             "\t:W - share writes (FILE_SHARE_WRITE)\n"
-             "\t:D - share deletes (FILE_SHARE_DELETE)\n"
-             "\t:H - FILE_ATTRIBUTE_HIDDEN\n"
-             "\t:O - FILE_ATTRIBUTE_READONLY\n"
-             "\t:F - FILE_ATTRIBUTE_OFFLINE\n"
-             "\t:T - FILE_ATTRIBUTE_TEMPORARY\n"
-             "\t:d - FILE_FLAG_DELETE_ON_CLOSE\n"
-             "\t:b - FILE_FLAG_NO_BUFFERING\n")
+             "  * :r - open this file for reading\n"
+             "  * :w - open this file for writing\n"
+             "  * :c - create a new file (O_CREATE)\n"
+             "  * :e - fail if the file exists (O_EXCL)\n"
+             "  * :t - shorten an existing file to length 0 (O_TRUNC)\n\n"
+             "Posix only flags:\n\n"
+             "  * :a - append to a file (O_APPEND)\n"
+             "  * :x - O_SYNC\n"
+             "  * :C - O_NOCTTY\n\n"
+             "Windows only flags:\n\n"
+             "  * :R - share reads (FILE_SHARE_READ)\n"
+             "  * :W - share writes (FILE_SHARE_WRITE)\n"
+             "  * :D - share deletes (FILE_SHARE_DELETE)\n"
+             "  * :H - FILE_ATTRIBUTE_HIDDEN\n"
+             "  * :O - FILE_ATTRIBUTE_READONLY\n"
+             "  * :F - FILE_ATTRIBUTE_OFFLINE\n"
+             "  * :T - FILE_ATTRIBUTE_TEMPORARY\n"
+             "  * :d - FILE_FLAG_DELETE_ON_CLOSE\n"
+             "  * :b - FILE_FLAG_NO_BUFFERING\n")
     },
     {
         "os/pipe", os_pipe,
@@ -2078,6 +2160,8 @@ void janet_lib_os(JanetTable *env) {
         InitializeCriticalSection(&env_lock);
         env_lock_initialized = 1;
     }
+#endif
+#ifndef JANET_NO_PROCESSES
 #endif
     janet_core_cfuns(env, NULL, os_cfuns);
 }

src/core/parse.c

@@ -985,8 +985,20 @@ static Janet cfun_parse_flush(int32_t argc, Janet *argv) {
 }
 
 static Janet cfun_parse_where(int32_t argc, Janet *argv) {
-    janet_fixarity(argc, 1);
+    janet_arity(argc, 1, 3);
     JanetParser *p = janet_getabstract(argv, 0, &janet_parser_type);
+    if (argc > 1) {
+        int32_t line = janet_getinteger(argv, 1);
+        if (line < 1)
+            janet_panicf("invalid line number %d", line);
+        p->line = (size_t) line;
+    }
+    if (argc > 2) {
+        int32_t column = janet_getinteger(argv, 2);
+        if (column < 0)
+            janet_panicf("invalid column number %d", column);
+        p->column = (size_t) column;
+    }
     Janet *tup = janet_tuple_begin(2);
     tup[0] = janet_wrap_integer(p->line);
     tup[1] = janet_wrap_integer(p->column);
@@ -1247,8 +1259,10 @@ static const JanetReg parse_cfuns[] = {
     },
     {
         "parser/where", cfun_parse_where,
-        JDOC("(parser/where parser)\n\n"
-             "Returns the current line number and column of the parser's internal state.")
+        JDOC("(parser/where parser &opt line col)\n\n"
+             "Returns the current line number and column of the parser's internal state. If line is "
+             "provided, the current line number of the parser is first set to that value. If column is "
+             "also provided, the current column number of the parser is also first set to that value.")
     },
     {
         "parser/eof", cfun_parse_eof,

src/core/util.c

@@ -227,19 +227,21 @@ int32_t janet_string_calchash(const uint8_t *str, int32_t len) {
 /* Computes hash of an array of values */
 int32_t janet_array_calchash(const Janet *array, int32_t len) {
     const Janet *end = array + len;
-    uint32_t hash = 5381;
-    while (array < end)
-        hash = (hash << 5) + hash + janet_hash(*array++);
+    uint32_t hash = 0;
+    while (array < end) {
+        uint32_t elem = janet_hash(*array++);
+        hash ^= elem + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+    }
     return (int32_t) hash;
 }
 
 /* Computes hash of an array of values */
 int32_t janet_kv_calchash(const JanetKV *kvs, int32_t len) {
     const JanetKV *end = kvs + len;
-    uint32_t hash = 5381;
+    uint32_t hash = 0;
     while (kvs < end) {
-        hash = (hash << 5) + hash + janet_hash(kvs->key);
-        hash = (hash << 5) + hash + janet_hash(kvs->value);
+        hash ^= janet_hash(kvs->key) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+        hash ^= janet_hash(kvs->value) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
         kvs++;
     }
     return (int32_t) hash;

src/core/value.c

@@ -28,6 +28,8 @@
 #include <janet.h>
 #endif
 
+#include <math.h>
+
 JANET_THREAD_LOCAL JanetTraversalNode *janet_vm_traversal = NULL;
 JANET_THREAD_LOCAL JanetTraversalNode *janet_vm_traversal_top = NULL;
 JANET_THREAD_LOCAL JanetTraversalNode *janet_vm_traversal_base = NULL;
@@ -261,6 +263,21 @@ int32_t janet_hash(Janet x) {
         case JANET_STRUCT:
             hash = janet_struct_hash(janet_unwrap_struct(x));
             break;
+        case JANET_NUMBER: {
+            double num = janet_unwrap_number(x);
+            if (isnan(num) || isinf(num) || num == 0) {
+                hash = 0;
+            } else {
+                hash = (int32_t)num;
+                hash = ((hash >> 16) ^ hash) * 0x45d9f3b;
+                hash = ((hash >> 16) ^ hash) * 0x45d9f3b;
+                hash = (hash >> 16) ^ hash;
+
+                uint32_t lo = (uint32_t)(janet_u64(x) & 0xFFFFFFFF);
+                hash ^= lo + 0x9e3779b9 + (hash << 6) + (hash >> 2);
+            }
+            break;
+        }
         case JANET_ABSTRACT: {
             JanetAbstract xx = janet_unwrap_abstract(x);
             const JanetAbstractType *at = janet_abstract_type(xx);

src/core/vm.c

@@ -1478,7 +1478,6 @@ int janet_init(void) {
     janet_vm_fiber = NULL;
     janet_vm_root_fiber = NULL;
     janet_vm_stackn = 0;
-    /* Threads */
 #ifdef JANET_THREADS
     janet_threads_init();
 #endif

src/include/janet.h

@@ -1279,14 +1279,59 @@ JANET_API JanetListenerState *janet_listen(JanetStream *stream, JanetListener be
 
 /* Shorthand for yielding to event loop in C */
 JANET_NO_RETURN JANET_API void janet_await(void);
+JANET_NO_RETURN JANET_API void janet_sleep_await(double sec);
 
 /* For use inside listeners - adds a timeout to the current fiber, such that
  * it will be resumed after sec seconds if no other event schedules the current fiber. */
 JANET_API void janet_addtimeout(double sec);
+JANET_API void janet_ev_inc_refcount(void);
+JANET_API void janet_ev_dec_refcount(void);
 
 /* Get last error from a an IO operation */
 JANET_API Janet janet_ev_lasterr(void);
 
+/* Async service for calling a function or syscall in a background thread. This is not
+ * as efficient in the slightest as using Streams but can be used for arbitrary blocking
+ * functions and syscalls. */
+
+/* Used to pass data between the main thread and worker threads for simple tasks.
+ * We could just use a pointer but this prevents malloc/free in the common case
+ * of only a handful of arguments. */
+typedef struct {
+    int tag;
+    int argi;
+    void *argp;
+    JanetFiber *fiber;
+} JanetEVGenericMessage;
+
+/* How to resume or cancel after a threaded call. Not exhaustive of the possible
+ * ways one might want to resume after returning from a threaded call, but should
+ * cover most of the common cases. For something more complicated, such as resuming
+ * with an abstract type or a struct, one should use janet_ev_threaded_call instead
+ * of janet_ev_threaded_await with a custom callback. */
+
+#define JANET_EV_TCTAG_NIL 0          /* resume with nil */
+#define JANET_EV_TCTAG_INTEGER 1      /* resume with janet_wrap_integer(argi) */
+#define JANET_EV_TCTAG_STRING 2       /* resume with janet_cstringv((const char *) argp) */
+#define JANET_EV_TCTAG_STRINGF 3      /* resume with janet_cstringv((const char *) argp), then call free on argp. */
+#define JANET_EV_TCTAG_KEYWORD 4      /* resume with janet_ckeywordv((const char *) argp) */
+#define JANET_EV_TCTAG_ERR_STRING 5   /* cancel with janet_cstringv((const char *) argp) */
+#define JANET_EV_TCTAG_ERR_STRINGF 6  /* cancel with janet_cstringv((const char *) argp), then call free on argp. */
+#define JANET_EV_TCTAG_ERR_KEYWORD 7  /* cancel with janet_ckeywordv((const char *) argp) */
+
+/* Function pointer that is run in the thread pool */
+typedef JanetEVGenericMessage(*JanetThreadedSubroutine)(JanetEVGenericMessage arguments);
+
+/* Handler that is run in the main thread with the result of the JanetAsyncSubroutine */
+typedef void (*JanetThreadedCallback)(JanetEVGenericMessage return_value);
+
+/* API calls for quickly offloading some work in C to a new thread or thread pool. */
+JANET_API void janet_ev_threaded_call(JanetThreadedSubroutine fp, JanetEVGenericMessage arguments, JanetThreadedCallback cb);
+JANET_API void janet_ev_threaded_await(JanetThreadedSubroutine fp, int tag, int argi, void *argp);
+
+/* Callback used by janet_ev_threaded_await */
+JANET_API void janet_ev_default_threaded_callback(JanetEVGenericMessage return_value);
+
 /* Read async from a stream */
 JANET_API void janet_ev_read(JanetStream *stream, JanetBuffer *buf, int32_t nbytes);
 JANET_API void janet_ev_readchunk(JanetStream *stream, JanetBuffer *buf, int32_t nbytes);

src/mainclient/shell.c

@@ -758,6 +758,10 @@ static int line() {
                 kleft();
                 break;
             case 3:     /* ctrl-c */
+                clearlines();
+                gbl_sigint_flag = 1;
+                return -1;
+            case 17:    /* ctrl-q */
                 gbl_cancel_current_repl_form = 1;
                 clearlines();
                 return -1;

test/install/test/test1.janet

@@ -1,3 +1,3 @@
-(import build/testmod :as testmod)
+(import /build/testmod :as testmod)
 
 (if (not= 5 (testmod/get5)) (error "testmod/get5 failed"))

test/install/testexec.janet

@@ -1,7 +1,7 @@
-(use build/testmod)
-(use build/testmod2)
-(use build/testmod3)
-(use build/test-mod-4)
+(use /build/testmod)
+(use /build/testmod2)
+(use /build/testmod3)
+(use /build/test-mod-4)
 
 (defn main [&]
   (print "Hello from executable!")

test/suite0006.janet

@@ -128,6 +128,18 @@
 (assert (not= nil (parse-error @"\xc3\x28")) "reject invalid utf-8 symbol")
 (assert (not= nil (parse-error @":\xc3\x28")) "reject invalid utf-8 keyword")
 
+# Parser line and column numbers
+(defn parser-location [input &opt location]
+  (def p (parser/new))
+  (parser/consume p input)
+  (if location
+    (parser/where p ;location)
+    (parser/where p)))
+
+(assert (= [1 7] (parser-location @"(+ 1 2)")) "parser location 1")
+(assert (= [5 7] (parser-location @"(+ 1 2)" [5])) "parser location 2")
+(assert (= [10 10] (parser-location @"(+ 1 2)" [10 10])) "parser location 3")
+
 # String check-set
 (assert (string/check-set "abc" "a") "string/check-set 1")
 (assert (not (string/check-set "abc" "z")) "string/check-set 2")

test/suite0009.janet

@@ -40,7 +40,7 @@
 # or else the first read can fail. Might be a strange windows
 # "bug", but needs further investigating. Otherwise, `build_win test`
 # can sometimes fail on windows, leading to flaky testing.
-(ev/sleep 0.2)
+(ev/sleep 0.3)
 
 (defn test-echo [msg]
   (with [conn (net/connect "127.0.0.1" "8000")]
@@ -59,6 +59,7 @@
 (var pipe-counter 0)
 (def chan (ev/chan 10))
 (let [[reader writer] (os/pipe)]
+  (ev/sleep 0.3)
   (ev/spawn
     (while (ev/read reader 3)
       (++ pipe-counter))