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Code Issues 1 Releases Wiki Activity

Do not explicitly free state machines, instead return a status.

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This makes it harder to have some kind of use after free issue.
This commit is contained in:
Calvin Rose
2020-05-30 11:29:58 -05:00
parent 117ae196fd
commit a78af0a7fb
4 changed files with 37 additions and 23 deletions
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25
src/include/janet.h
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@@ -1142,13 +1142,21 @@ extern enum JanetInstructionType janet_instructions[JOP_INSTRUCTION_COUNT];
#ifdef JANET_EV
#define JANET_POLL_FLAG_CLOSED 0x1
#define JANET_POLL_FLAG_SOCKET 0x2
#define JANET_ASYNC_EVENT_INIT 0
#define JANET_ASYNC_EVENT_MARK 1
#define JANET_ASYNC_EVENT_DEINIT 2
#define JANET_ASYNC_EVENT_CLOSE 3
#define JANET_ASYNC_EVENT_READ 4
#define JANET_ASYNC_EVENT_WRITE 5
#define JANET_ASYNC_EVENT_TIMEOUT 6
typedef enum {
JANET_ASYNC_EVENT_INIT,
JANET_ASYNC_EVENT_MARK,
JANET_ASYNC_EVENT_DEINIT,
JANET_ASYNC_EVENT_CLOSE,
JANET_ASYNC_EVENT_READ,
JANET_ASYNC_EVENT_WRITE,
JANET_ASYNC_EVENT_TIMEOUT
} JanetAsyncEvent;
typedef enum {
JANET_ASYNC_STATUS_NOT_DONE,
JANET_ASYNC_STATUS_DONE
} JanetAsyncStatus;
/* Typedefs */
#ifdef JANET_WINDOWS
@@ -1158,7 +1166,7 @@ typedef int JanetPollType;
#endif
typedef struct JanetListenerState JanetListenerState;
typedef struct JanetPollable JanetPollable;
typedef void (*JanetListener)(JanetListenerState *state, int event);
typedef JanetAsyncStatus(*JanetListener)(JanetListenerState *state, JanetAsyncEvent event);
/* Wrapper around file descriptors and HANDLEs that can be polled. */
struct JanetPollable {
@@ -1192,7 +1200,6 @@ JANET_API void janet_schedule(JanetFiber *fiber, Janet value);
/* Start a state machine listening for events from a pollable */
JANET_API JanetListenerState *janet_listen(JanetPollable *pollable, JanetListener behavior, int mask, size_t size);
JANET_API void janet_unlisten(JanetListenerState *state);
/* Shorthand for yielding to event loop in C */
JANET_NO_RETURN JANET_API void janet_await(void);