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Code Issues 1 Releases Wiki Activity

Add struct type.

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This commit is contained in:
Calvin Rose 2017-04-15 16:05:59 -04:00
parent 20bb5a18f7
commit e90b66af58
17 changed files with 613 additions and 436 deletions
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7
Makefile
View File

@ -7,6 +7,7 @@ CFLAGS=-std=c99 -Wall -Wextra -Wpedantic -g -I./include
PREFIX=/usr/local
GST_TARGET=client/gst
GST_CORELIB=core/libgst.a
GST_INTERNAL_HEADERS=$(addprefix core/, cache.h)
GST_HEADERS=$(addprefix include/gst/, gst.h stl.h compile.h disasm.h parse.h)
all: $(GST_TARGET)
@ -15,7 +16,7 @@ all: $(GST_TARGET)
##### The core vm and runtime #####
###################################
GST_CORE_SOURCES=$(addprefix core/,\
compile.c disasm.c parse.c stl.c strings.c \
compile.c disasm.c parse.c stl.c strings.c ids.c \
value.c vm.c ds.c gc.c thread.c serialize.c capi.c)
GST_CORE_OBJECTS=$(patsubst %.c,%.o,$(GST_CORE_SOURCES))
$(GST_CORELIB): $(GST_CORE_OBJECTS) $(GST_HEADERS)
@ -26,11 +27,11 @@ $(GST_CORELIB): $(GST_CORE_OBJECTS) $(GST_HEADERS)
##############################
GST_CLIENT_SOURCES=client/main.c
GST_CLIENT_OBJECTS=$(patsubst %.c,%.o,$(GST_CLIENT_SOURCES))
$(GST_TARGET): $(GST_CLIENT_OBJECTS) $(GST_HEADERS) $(GST_CORELIB)
$(GST_TARGET): $(GST_CLIENT_OBJECTS) $(GST_CORELIB)
$(CC) $(CFLAGS) -o $(GST_TARGET) $(GST_CLIENT_OBJECTS) $(GST_CORELIB)
# Compile all .c to .o
%.o : %.c $(GST_HEADERS)
%.o : %.c $(GST_HEADERS) $(GST_INTERNAL_HEADERS)
$(CC) $(CFLAGS) -o $@ -c $<
run: $(GST_TARGET)

4
client/main.c
View File

@ -59,7 +59,7 @@ void debug_repl(FILE *in, FILE *out) {
gst_compiler(&c, &vm);
func.type = GST_NIL;
gst_compiler_usemodule(&c, "std");
gst_compiler_global(&c, "ans", gst_object_get(vm.rootenv, gst_load_cstring(&vm, "ans")));
gst_compiler_global(&c, "ans", gst_object_get(vm.rootenv, gst_string_cv(&vm, "ans")));
func.type = GST_FUNCTION;
func.data.function = gst_compiler_compile(&c, p.value);
@ -88,7 +88,7 @@ void debug_repl(FILE *in, FILE *out) {
continue;
} else if (out) {
fprintf(out, "%s\n", (char *)gst_to_string(&vm, vm.ret));
gst_object_put(&vm, vm.rootenv, gst_load_cstring(&vm, "ans"), vm.ret);
gst_object_put(&vm, vm.rootenv, gst_string_cv(&vm, "ans"), vm.ret);
}
}

10
core/cache.h Normal file
View File

@ -0,0 +1,10 @@
#ifndef CACHE_H_LVYZMBLR
#define CACHE_H_LVYZMBLR
#include <gst/gst.h>
void gst_cache_remove_string(Gst *vm, char *strmem);
void gst_cache_remove_tuple(Gst *vm, char *tuplemem);
void gst_cache_remove_struct(Gst *vm, char *structmem);
#endif /* end of include guard: CACHE_H_LVYZMBLR */

4
core/capi.c
View File

@ -3,7 +3,7 @@
GstObject *gst_c_module(Gst *vm, const GstModuleItem *mod) {
GstObject *module = gst_object(vm, 10);
while (mod->name != NULL) {
GstValue key = gst_load_cstring(vm, mod->name);
GstValue key = gst_string_cv(vm, mod->name);
GstValue val;
val.type = GST_CFUNCTION;
val.data.cfunction = mod->data;
@ -19,5 +19,5 @@ void gst_c_register(Gst *vm, const char *packagename, GstObject *mod) {
vm->rootenv = gst_object(vm, 10);
modv.type = GST_OBJECT;
modv.data.object = mod;
gst_object_put(vm, vm->rootenv, gst_load_cstring(vm, packagename), modv);
gst_object_put(vm, vm->rootenv, gst_string_cv(vm, packagename), modv);
}

26
core/compile.c
View File

@ -488,7 +488,7 @@ static Slot compile_assign(GstCompiler *c, FormOptions opts, GstValue left, GstV
/* Compile series of expressions. This compiles the meat of
* function definitions and the inside of do forms. */
static Slot compile_block(GstCompiler *c, FormOptions opts, GstValue *form, uint32_t startIndex) {
static Slot compile_block(GstCompiler *c, FormOptions opts, const GstValue *form, uint32_t startIndex) {
GstScope *scope = c->tail;
FormOptions subOpts = form_options_default();
uint32_t current = startIndex;
@ -542,7 +542,7 @@ static GstFuncDef *compiler_gen_funcdef(GstCompiler *c, uint32_t lastNBytes, uin
}
/* Compile a function from a function literal source form */
static Slot compile_function(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_function(GstCompiler *c, FormOptions opts, const GstValue *form) {
GstScope *scope = c->tail;
GstBuffer *buffer = c->buffer;
uint32_t current = 1;
@ -595,7 +595,7 @@ static Slot compile_function(GstCompiler *c, FormOptions opts, GstValue *form) {
}
/* Branching special */
static Slot compile_if(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_if(GstCompiler *c, FormOptions opts, const GstValue *form) {
GstScope *scope = c->tail;
GstBuffer *buffer = c->buffer;
FormOptions condOpts = opts;
@ -666,7 +666,7 @@ static Slot compile_if(GstCompiler *c, FormOptions opts, GstValue *form) {
}
/* Try catch special */
static Slot compile_try(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_try(GstCompiler *c, FormOptions opts, const GstValue *form) {
GstScope *scope = c->tail;
GstBuffer *buffer = c->buffer;
Slot body;
@ -730,7 +730,7 @@ static Slot compile_try(GstCompiler *c, FormOptions opts, GstValue *form) {
}
/* While special */
static Slot compile_while(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_while(GstCompiler *c, FormOptions opts, const GstValue *form) {
Slot cond;
uint32_t countAtStart = c->buffer->count;
uint32_t countAtJumpDelta;
@ -769,7 +769,7 @@ static Slot compile_while(GstCompiler *c, FormOptions opts, GstValue *form) {
}
/* Do special */
static Slot compile_do(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_do(GstCompiler *c, FormOptions opts, const GstValue *form) {
Slot ret;
compiler_push_scope(c, 1);
ret = compile_block(c, opts, form, 1);
@ -778,7 +778,7 @@ static Slot compile_do(GstCompiler *c, FormOptions opts, GstValue *form) {
}
/* Quote special - returns its argument as is. */
static Slot compile_quote(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_quote(GstCompiler *c, FormOptions opts, const GstValue *form) {
GstScope *scope = c->tail;
GstBuffer *buffer = c->buffer;
Slot ret;
@ -801,17 +801,17 @@ static Slot compile_quote(GstCompiler *c, FormOptions opts, GstValue *form) {
}
/* Assignment special */
static Slot compile_var(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_var(GstCompiler *c, FormOptions opts, const GstValue *form) {
if (gst_tuple_length(form) != 3)
c_error(c, "assignment expects 2 arguments");
return compile_assign(c, opts, form[1], form[2]);
}
/* Define a function type for Special Form helpers */
typedef Slot (*SpecialFormHelper) (GstCompiler *c, FormOptions opts, GstValue *form);
typedef Slot (*SpecialFormHelper) (GstCompiler *c, FormOptions opts, const GstValue *form);
/* Dispatch to a special form */
static SpecialFormHelper get_special(GstValue *form) {
static SpecialFormHelper get_special(const GstValue *form) {
const uint8_t *name;
if (gst_tuple_length(form) < 1 || form[0].type != GST_STRING)
return NULL;
@ -944,7 +944,7 @@ static Slot compile_object(GstCompiler *c, FormOptions opts, GstObject *obj) {
}
/* Compile a form. Checks for special forms and macros. */
static Slot compile_form(GstCompiler *c, FormOptions opts, GstValue *form) {
static Slot compile_form(GstCompiler *c, FormOptions opts, const GstValue *form) {
GstScope *scope = c->tail;
GstBuffer *buffer = c->buffer;
SpecialFormHelper helper;
@ -1026,7 +1026,7 @@ void gst_compiler(GstCompiler *c, Gst *vm) {
/* Add a global variable */
void gst_compiler_global(GstCompiler *c, const char *name, GstValue x) {
GstValue sym = gst_load_cstring(c->vm, name);
GstValue sym = gst_string_cv(c->vm, name);
compiler_declare_symbol(c, c->tail, sym);
gst_array_push(c->vm, c->env, x);
}
@ -1049,7 +1049,7 @@ void gst_compiler_globals(GstCompiler *c, GstObject *env) {
/* Use a module that was loaded into the vm */
void gst_compiler_usemodule(GstCompiler *c, const char *modulename) {
GstValue mod = gst_object_get(c->vm->rootenv, gst_load_cstring(c->vm, modulename));
GstValue mod = gst_object_get(c->vm->rootenv, gst_string_cv(c->vm, modulename));
if (mod.type == GST_OBJECT) {
gst_compiler_globals(c, mod.data.object);
}

17
core/ds.c
View File

@ -53,7 +53,7 @@ void gst_buffer_append(Gst *vm, GstBuffer *buffer, const uint8_t *string, uint32
/* Convert the buffer to a string */
const uint8_t *gst_buffer_to_string(Gst *vm, GstBuffer *buffer) {
return gst_string_loadbuffer(vm, buffer->data, buffer->count);
return gst_string_b(vm, buffer->data, buffer->count);
}
/****/
@ -132,20 +132,6 @@ GstValue gst_array_peek(GstArray *array) {
}
}
/****/
/* Tuple functions */
/****/
/* Create a new empty tuple of the given size. Expected to be
* mutated immediately */
GstValue *gst_tuple(Gst *vm, uint32_t length) {
char *data = gst_alloc(vm, 2 * sizeof(uint32_t) + length * sizeof(GstValue));
GstValue *tuple = (GstValue *)(data + (2 * sizeof(uint32_t)));
gst_tuple_length(tuple) = length;
gst_tuple_hash(tuple) = 0;
return tuple;
}
/****/
/* Userdata functions */
/****/
@ -290,3 +276,4 @@ void gst_object_put(Gst *vm, GstObject *o, GstValue key, GstValue value) {
}
}
}

22
core/gc.c
View File

@ -1,5 +1,5 @@
#include <gst/gst.h>
#include "stringcache.h"
#include "cache.h"
/* The metadata header associated with an allocated block of memory */
#define gc_header(mem) ((GCMemoryHeader *)(mem) - 1)
@ -102,6 +102,16 @@ void gst_mark(Gst *vm, GstValueUnion x, GstType type) {
}
break;
case GST_STRUCT:
if (gc_header(gst_struct_raw(x.st))->color != vm->black) {
uint32_t i, count;
count = gst_struct_capacity(x.st);
gc_header(gst_struct_raw(x.st))->color = vm->black;
for (i = 0; i < count; ++i)
gst_mark_value(vm, x.st[i]);
}
break;
case GST_THREAD:
if (gc_header(x.thread)->color != vm->black) {
GstThread *thread = x.thread;
@ -185,9 +195,13 @@ void gst_sweep(Gst *vm) {
} else {
vm->blocks = next;
}
/* Remove from string cache */
if (current->tags & GST_MEMTAG_STRING) {
gst_stringcache_remove(vm, (uint8_t *)(current + 1) + 2 * sizeof(uint32_t));
if (current->tags) {
if (current->tags & GST_MEMTAG_STRING)
gst_cache_remove_string(vm, (char *)(current + 1));
if (current->tags & GST_MEMTAG_STRUCT)
gst_cache_remove_struct(vm, (char *)(current + 1));
if (current->tags & GST_MEMTAG_TUPLE)
gst_cache_remove_tuple(vm, (char *)(current + 1));
}
gst_raw_free(current);
} else {

361
core/ids.c Normal file
View File

@ -0,0 +1,361 @@
#include <gst/gst.h>
/****/
/* Cache */
/****/
/* Calculate hash for string */
static uint32_t gst_string_calchash(const uint8_t *str, uint32_t len) {
const uint8_t *end = str + len;
uint32_t hash = 5381;
while (str < end)
hash = (hash << 5) + hash + *str++;
return hash;
}
/* Calculate hash for tuple (and struct) */
static uint32_t gst_tuple_calchash(const GstValue *tuple, uint32_t len) {
const GstValue *end = tuple + len;
uint32_t hash = 5381;
while (tuple < end)
hash = (hash << 5) + hash + gst_hash(*tuple++);
return hash;
}
/* Check if two not necesarrily finalized immutable values
* are equal. Does caching logic */
static int gst_cache_equal(GstValue x, GstValue y) {
uint32_t i, len;
if (x.type != y.type) return 0;
switch (x.type) {
/* Don't bother implemeting equality checks for all types. We only care
* about immutable data structures */
default:
return 0;
case GST_STRING:
if (gst_string_hash(x.data.string) != gst_string_hash(y.data.string)) return 0;
if (gst_string_length(x.data.string) != gst_string_length(y.data.string)) return 0;
len = gst_string_length(x.data.string);
for (i = 0; i < len; ++i)
if (x.data.string[i] != y.data.string[i])
return 0;
return 1;
case GST_STRUCT:
if (gst_struct_hash(x.data.st) != gst_struct_hash(y.data.st)) return 0;
if (gst_struct_length(x.data.st) != gst_struct_length(y.data.st)) return 0;
len = gst_struct_capacity(x.data.st);
for (i = 0; i < len; ++i)
if (!gst_equals(x.data.st[i], y.data.st[i]))
return 0;
return 1;
case GST_TUPLE:
if (gst_tuple_hash(x.data.tuple) != gst_tuple_hash(y.data.tuple)) return 0;
if (gst_tuple_length(x.data.tuple) != gst_tuple_length(y.data.tuple)) return 0;
len = gst_tuple_length(x.data.tuple);
for (i = 0; i < len; ++i)
if (!gst_equals(x.data.tuple[i], y.data.tuple[i]))
return 0;
return 1;
}
}
/* Find an item in the cache and return its location.
* If the item is not found, return the location
* where one would put it. */
static GstValue *gst_cache_find(Gst *vm, GstValue key, int *success) {
uint32_t bounds[4];
uint32_t i, j, index;
uint32_t hash = gst_hash(key);
GstValue *firstEmpty = NULL;
index = hash % vm->cache_capacity;
bounds[0] = index;
bounds[1] = vm->cache_capacity;
bounds[2] = 0;
bounds[3] = index;
for (j = 0; j < 4; j += 2)
for (i = bounds[j]; i < bounds[j+1]; ++i) {
GstValue test = vm->cache[i];
/* Check empty spots */
if (test.type == GST_NIL) {
if (firstEmpty == NULL)
firstEmpty = vm->cache + i;
goto notfound;
}
/* Check for marked deleted - use booleans as deleted */
if (test.type == GST_BOOLEAN) {
if (firstEmpty == NULL)
firstEmpty = vm->cache + i;
continue;
}
if (gst_cache_equal(test, key)) {
/* Replace first deleted */
*success = 1;
if (firstEmpty != NULL) {
*firstEmpty = test;
vm->cache[i].type = GST_BOOLEAN;
return firstEmpty;
}
return vm->cache + i;
}
}
notfound:
*success = 0;
return firstEmpty;
}
/* Resize the cache. */
static void gst_cache_resize(Gst *vm, uint32_t newCapacity) {
uint32_t i, oldCapacity;
GstValue *oldCache = vm->cache;
GstValue *newCache = gst_raw_calloc(1, newCapacity * sizeof(GstValue));
if (newCache == NULL)
GST_OUT_OF_MEMORY;
oldCapacity = vm->cache_capacity;
vm->cache = newCache;
vm->cache_capacity = newCapacity;
vm->cache_deleted = 0;
/* Add all of the old strings back */
for (i = 0; i < oldCapacity; ++i) {
int status;
GstValue *bucket;
GstValue x = oldCache[i];
if (x.type != GST_NIL && x.type != GST_BOOLEAN) {
bucket = gst_cache_find(vm, x, &status);
if (status || bucket == NULL) {
/* there was a problem with the algorithm. */
break;
}
*bucket = x;
}
}
/* Free the old cache */
gst_raw_free(oldCache);
}
/* Add a value to the cache */
static GstValue gst_cache_add(Gst *vm, GstValue x) {
int status = 0;
GstValue *bucket = gst_cache_find(vm, x, &status);
if (!status) {
if ((vm->cache_count + vm->cache_deleted) * 2 > vm->cache_capacity) {
gst_cache_resize(vm, vm->cache_count * 4);
bucket = gst_cache_find(vm, x, &status);
}
/* Mark the memory for the gc */
switch (x.type) {
default:
break;
case GST_STRING:
gst_mem_tag(gst_string_raw(x.data.string), GST_MEMTAG_STRING);
break;
case GST_STRUCT:
gst_mem_tag(gst_struct_raw(x.data.st), GST_MEMTAG_STRUCT);
break;
case GST_TUPLE:
gst_mem_tag(gst_tuple_raw(x.data.tuple), GST_MEMTAG_TUPLE);
break;
}
/* Add x to the cache */
vm->cache_count++;
*bucket = x;
return x;
} else {
return *bucket;
}
}
/* Remove a value from the cache */
static void gst_cache_remove(Gst *vm, GstValue x) {
int status = 0;
GstValue *bucket = gst_cache_find(vm, x, &status);
if (status) {
vm->cache_count--;
vm->cache_deleted++;
bucket->type = GST_BOOLEAN;
}
}
/* Remove a string from cache (called from gc) */
void gst_cache_remove_string(Gst *vm, char *strmem) {
GstValue x;
x.type = GST_STRING;
x.data.string = (const uint8_t *)(strmem + 2 * sizeof(uint32_t));
gst_cache_remove(vm, x);
}
/* Remove a tuple from cache (called from gc) */
void gst_cache_remove_tuple(Gst *vm, char *tuplemem) {
GstValue x;
x.type = GST_TUPLE;
x.data.tuple = (const GstValue *)(tuplemem + 2 * sizeof(uint32_t));
gst_cache_remove(vm, x);
}
/* Remove a struct from cache (called from gc) */
void gst_cache_remove_struct(Gst *vm, char *structmem) {
GstValue x;
x.type = GST_STRUCT;
x.data.st = (const GstValue *)(structmem + 2 * sizeof(uint32_t));
gst_cache_remove(vm, x);
}
/****/
/* Struct Functions */
/****/
/* Begin creation of a struct */
GstValue *gst_struct_begin(Gst *vm, uint32_t count) {
char *data = gst_alloc(vm, sizeof(uint32_t) * 2 + 4 * count * sizeof(GstValue));
GstValue *st = (GstValue *) (data + 2 * sizeof(uint32_t));
gst_struct_length(st) = count;
return st;
}
/* Put a kv pair into a struct that has not yet been fully constructed. */
void gst_struct_put(GstValue *st, GstValue key, GstValue value) {
uint32_t cap = gst_struct_capacity(st);
uint32_t index = (gst_hash(key) % (cap / 2)) * 2;
uint32_t i;
for (i = index; i < cap; i += 2) {
if (st[i + 1].type == GST_NIL) {
st[i] = key;
st[i + 1] = value;
return;
}
}
for (i = 0; i < index; i += 2) {
if (st[i + 1].type == GST_NIL) {
st[i] = key;
st[i + 1] = value;
return;
}
}
/* Should not get here if struct was initialized with proper size */
}
/* Finish building a struct */
const GstValue *gst_struct_end(Gst *vm, GstValue *st) {
GstValue cached;
GstValue check;
gst_struct_hash(st) = gst_tuple_calchash(st, gst_struct_capacity(st));
check.type = GST_STRUCT;
check.data.st = (const GstValue *) st;
cached = gst_cache_add(vm, check);
return cached.data.st;
}
/* Get an item from a struct */
GstValue gst_struct_get(const GstValue *st, GstValue key) {
GstValue ret;
uint32_t cap = gst_struct_capacity(st);
uint32_t index = (gst_hash(key) % (cap / 2)) * 2;
uint32_t i;
for (i = index; i < cap; i += 2) {
if (st[i + 1].type == GST_NIL) {
goto notfound;
} else if (gst_equals(st[i], key)) {
return st[i + 1];
}
}
for (i = 0; i < index; i += 2) {
if (st[i + 1].type == GST_NIL) {
goto notfound;
} else if (gst_equals(st[i], key)) {
return st[i + 1];
}
}
notfound:
ret.type = GST_NIL;
return ret;
}
/****/
/* Tuple functions */
/****/
/* Create a new empty tuple of the given size. Expected to be
* mutated immediately */
GstValue *gst_tuple_begin(Gst *vm, uint32_t length) {
char *data = gst_alloc(vm, 2 * sizeof(uint32_t) + length * sizeof(GstValue));
GstValue *tuple = (GstValue *)(data + (2 * sizeof(uint32_t)));
gst_tuple_length(tuple) = length;
return tuple;
}
/* Finish building a tuple */
const GstValue *gst_tuple_end(Gst *vm, GstValue *tuple) {
GstValue cached;
GstValue check;
gst_tuple_hash(tuple) = gst_tuple_calchash(tuple, gst_tuple_length(tuple));
check.type = GST_TUPLE;
check.data.tuple = (const GstValue *) tuple;
cached = gst_cache_add(vm, check);
return cached.data.tuple;
}
/****/
/* String Functions */
/****/
/* Begin building a string */
uint8_t *gst_string_begin(Gst *vm, uint32_t length) {
char *data = gst_alloc(vm, 2 * sizeof(uint32_t) + length + 1);
uint8_t *str = (uint8_t *) (data + 2 * sizeof(uint32_t));
gst_string_length(str) = length;
str[length] = 0;
return str;
}
/* Finish building a string */
const uint8_t *gst_string_end(Gst *vm, uint8_t *str) {
GstValue cached;
GstValue check;
gst_string_hash(str) = gst_string_calchash(str, gst_string_length(str));
check.type = GST_STRING;
check.data.string = (const uint8_t *) str;
cached = gst_cache_add(vm, check);
return cached.data.string;
}
/* Load a buffer as a string */
const uint8_t *gst_string_b(Gst *vm, const uint8_t *buf, uint32_t len) {
GstValue cached;
GstValue check;
uint32_t newbufsize = len + 2 * sizeof(uint32_t) + 1;
uint8_t *str;
/* Ensure enough scratch memory */
if (vm->scratch_len < newbufsize) {
vm->scratch = gst_alloc(vm, newbufsize);
vm->scratch_len = newbufsize;
}
str = (uint8_t *)(vm->scratch + 2 * sizeof(uint32_t));
gst_memcpy(str, buf, len);
gst_string_length(str) = len;
gst_string_hash(str) = gst_string_calchash(str, gst_string_length(str));
str[len] = 0;
check.type = GST_STRING;
check.data.string = (const uint8_t *) str;
cached = gst_cache_add(vm, check);
if (cached.data.string == (const uint8_t *) str) {
vm->scratch_len = 0;
vm->scratch = NULL;
}
return cached.data.string;
}
/* Load a c string */
const uint8_t *gst_string_c(Gst *vm, const char *str) {
uint32_t len = 0;
while (str[len]) ++len;
return gst_string_b(vm, (const uint8_t *)str, len);
}
/* Load a c string and return it as a GstValue */
GstValue gst_string_cv(Gst *vm, const char *str) {
GstValue ret;
const uint8_t *data = gst_string_c(vm, str);
ret.type = GST_STRING;
ret.data.string = data;
return ret;
}

14
core/parse.c
View File

@ -65,11 +65,11 @@ static GstValue quote(GstParser *p, GstValue x) {
/* Load a quote form to get the string literal */
GstValue tuplev;
GstValue *tuple;
tuple = gst_tuple(p->vm, 2);
tuplev.type = GST_TUPLE;
tuplev.data.tuple = tuple;
tuple[0] = gst_load_cstring(p->vm, "quote");
tuple = gst_tuple_begin(p->vm, 2);
tuple[0] = gst_string_cv(p->vm, "quote");
tuple[1] = x;
tuplev.type = GST_TUPLE;
tuplev.data.tuple = gst_tuple_end(p->vm, tuple);
return tuplev;
}
@ -376,9 +376,11 @@ static int form_state(GstParser *p, uint8_t c) {
x.type = GST_ARRAY;
x.data.array = array;
} else if (c == ')') {
GstValue *tup;
tup = gst_tuple_begin(p->vm, array->count);
gst_memcpy(tup, array->data, array->count * sizeof(GstValue));
x.type = GST_TUPLE;
x.data.tuple = gst_tuple(p->vm, array->count);
gst_memcpy(x.data.tuple, array->data, array->count * sizeof(GstValue));
x.data.tuple = gst_tuple_end(p->vm, tup);
} else { /* c == '{' */
uint32_t i;
if (array->count % 2 != 0) {

27
core/serialize.c
View File

@ -78,7 +78,6 @@ static const char *gst_deserialize_impl(
GstValue ret;
ret.type = GST_NIL;
GstValue *buffer;
const uint8_t *bytebuf;
uint32_t length, i;
const char *err;
@ -137,11 +136,27 @@ static const char *gst_deserialize_impl(
ret.type = GST_STRING;
read_u32(length);
deser_datacheck(length);
ret.data.string = gst_string_loadbuffer(vm, data, length);
ret.data.string = gst_string_b(vm, data, length);
data += length;
gst_array_push(vm, visited, ret);
break;
case 206: /* Struct */
ret.type = GST_STRUCT;
read_u32(length);
buffer = gst_struct_begin(vm, length);
for (i = 0; i < length; ++i) {
GstValue k, v;
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, &k)))
return err;
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, &v)))
return err;
gst_struct_put(buffer, k, v);
}
ret.data.st = gst_struct_end(vm, buffer);
gst_array_push(vm, visited, ret);
break;
case 207: /* Buffer */
ret.type = GST_BYTEBUFFER;
read_u32(length);
@ -172,14 +187,12 @@ static const char *gst_deserialize_impl(
case 209: /* Tuple */
ret.type = GST_TUPLE;
read_u32(length);
bytebuf = gst_alloc(vm, length * sizeof(GstValue) + 2 * sizeof(uint32_t));
buffer = (GstValue *)(bytebuf + 2 * sizeof(uint32_t));
buffer = gst_tuple_begin(vm, length);
for (i = 0; i < length; ++i)
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, buffer + i)))
return err;
gst_tuple_hash(buffer) = 0;
gst_tuple_length(buffer) = length;
ret.data.tuple = buffer;
ret.type = GST_TUPLE;
ret.data.tuple = gst_tuple_end(vm, buffer);
gst_array_push(vm, visited, ret);
break;

31
core/stl.c
View File

@ -197,7 +197,7 @@ int gst_stl_type(Gst *vm) {
typestr = "funcdef";
break;
}
gst_c_return(vm, gst_load_cstring(vm, typestr));
gst_c_return(vm, gst_string_cv(vm, typestr));
}
/* Create array */
@ -219,12 +219,12 @@ int gst_stl_tuple(Gst *vm) {
uint32_t i;
uint32_t count = gst_count_args(vm);
GstValue ret;
GstValue *tuple= gst_tuple(vm, count);
GstValue *tuple= gst_tuple_begin(vm, count);
for (i = 0; i < count; ++i) {
tuple[i] = gst_arg(vm, i);
}
ret.type = GST_TUPLE;
ret.data.tuple = tuple;
ret.data.tuple = gst_tuple_end(vm, tuple);
gst_c_return(vm, ret);
}
@ -237,7 +237,7 @@ int gst_stl_object(Gst *vm) {
if (count % 2 != 0) {
gst_c_throwc(vm, "expected even number of arguments");
}
object = gst_object(vm, count);
object = gst_object(vm, count / 2);
for (i = 0; i < count; i += 2) {
gst_object_put(vm, object, gst_arg(vm, i), gst_arg(vm, i + 1));
}
@ -246,6 +246,24 @@ int gst_stl_object(Gst *vm) {
gst_c_return(vm, ret);
}
/* Create struct */
int gst_stl_struct(Gst *vm) {
uint32_t i;
uint32_t count = gst_count_args(vm);
GstValue ret;
GstValue *st;
if (count % 2 != 0) {
gst_c_throwc(vm, "expected even number of arguments");
}
st = gst_struct_begin(vm, count / 2);
for (i = 0; i < count; i += 2) {
gst_struct_put(st, gst_arg(vm, i), gst_arg(vm, i + 1));
}
ret.type = GST_STRUCT;
ret.data.st = gst_struct_end(vm, st);
gst_c_return(vm, ret);
}
/* Create a buffer */
int gst_stl_buffer(Gst *vm) {
uint32_t i, count;
@ -308,7 +326,6 @@ int gst_stl_rawget(Gst *vm) {
/* Associative rawset */
int gst_stl_rawset(Gst *vm) {
GstValue ret;
uint32_t count;
const char *err;
count = gst_count_args(vm);
@ -319,8 +336,7 @@ int gst_stl_rawset(Gst *vm) {
if (err != NULL) {
gst_c_throwc(vm, err);
} else {
ret.type = GST_NIL;
gst_c_return(vm, ret);
gst_c_return(vm, gst_arg(vm, 0));
}
}
@ -408,6 +424,7 @@ static const GstModuleItem const std_module[] = {
{"array", gst_stl_array},
{"tuple", gst_stl_tuple},
{"object", gst_stl_object},
{"struct", gst_stl_struct},
{"buffer", gst_stl_buffer},
{"strcat", gst_stl_strcat},
{"print", gst_stl_print},

14
core/stringcache.h
View File

@ -1,14 +0,0 @@
#ifndef GST_STRINGCACHE_defined
#define GST_STRINGCACHE_defined
#include <gst/gst.h>
/****/
/* String Cache (move internal) */
/****/
void gst_stringcache_init(Gst *vm, uint32_t capacity);
void gst_stringcache_deinit(Gst *vm);
void gst_stringcache_remove(Gst *vm, const uint8_t *str);
#endif

222
core/strings.c
View File

@ -1,224 +1,4 @@
#include <gst/gst.h>
#include "stringcache.h"
/* Dud pointer to serve as deletion marker */
static uint8_t *deleted = (uint8_t *) "";
/* Check if string and cstring are equal */
/* To check if strings are equal externally, one can
* just use == */
static int gst_cstring_equal(const uint8_t *lhs, const uint8_t *rhs, uint32_t rlen, uint32_t rhash) {
uint32_t lhash, len, i;
/* Check lengths */
len = gst_string_length(lhs);
if (len != rlen) return 0;
/* Check hashes */
lhash = gst_string_hash(lhs);
if (lhash != rhash) return 0;
for (i = 0; i < len; ++i)
if (lhs[i] != rhs[i])
return 0;
return 1;
}
/* Simple hash function (djb2) */
static uint32_t gst_string_calchash(const uint8_t *str, uint32_t len) {
const uint8_t *end = str + len;
uint32_t hash = 5381;
while (str < end)
hash = (hash << 5) + hash + *str++;
return hash;
}
/* Find a string in the hashtable. Returns null if
* not found. */
static const uint8_t **gst_stringcache_find(
Gst *vm,
const uint8_t *str,
uint32_t len,
uint32_t hash,
int *success) {
uint32_t bounds[4];
uint32_t i, j, index;
const uint8_t **firstEmpty = NULL;
index = hash % vm->stringsCapacity;
bounds[0] = index;
bounds[1] = vm->stringsCapacity;
bounds[2] = 0;
bounds[3] = index;
for (j = 0; j < 4; j += 2)
for (i = bounds[j]; i < bounds[j+1]; ++i) {
const uint8_t *testStr = vm->strings[i];
/* Check empty spots */
if (testStr == NULL) {
if (firstEmpty == NULL)
firstEmpty = vm->strings + i;
goto notfound;
}
if (testStr == deleted) {
if (firstEmpty == NULL)
firstEmpty = vm->strings + i;
continue;
}
if (gst_cstring_equal(testStr, str, len, hash)) {
/* Replace first deleted */
*success = 1;
if (firstEmpty != NULL) {
*firstEmpty = testStr;
vm->strings[i] = deleted;
return firstEmpty;
}
return vm->strings + i;
}
}
notfound:
*success = 0;
return firstEmpty;
}
/* Resize the hashtable. */
static void gst_stringcache_resize(Gst *vm, uint32_t newCapacity) {
uint32_t i, oldCapacity;
const uint8_t **oldCache = vm->strings;
const uint8_t **newCache = gst_raw_calloc(1, newCapacity * sizeof(uint8_t *));
if (newCache == NULL)
GST_OUT_OF_MEMORY;
oldCapacity = vm->stringsCapacity;
vm->strings = newCache;
vm->stringsCapacity = newCapacity;
vm->stringsDeleted = 0;
/* Add all of the old strings back */
for (i = 0; i < oldCapacity; ++i) {
int status;
const uint8_t **bucket;
const uint8_t *str = oldCache[i];
if (str != NULL && str != deleted) {
bucket = gst_stringcache_find(vm, str,
gst_string_length(str),
gst_string_hash(str), &status);
if (status || bucket == NULL) {
/* there was a problem with the algorithm. */
break;
}
*bucket = str;
}
}
/* Free the old cache */
gst_raw_free(oldCache);
}
/****/
/* Internal API */
/****/
/* Initialize the string cache for a vm */
void gst_stringcache_init(Gst *vm, uint32_t capacity) {
vm->strings = gst_raw_calloc(1, capacity * sizeof(uint8_t *));
if (vm->strings == NULL)
GST_OUT_OF_MEMORY;
vm->stringsCapacity = capacity;
vm->stringsCount = 0;
vm->stringsDeleted = 0;
}
/* Deinitialize the stringcache for a vm */
void gst_stringcache_deinit(Gst *vm) {
gst_raw_free(vm->strings);
vm->stringsCapacity = 0;
vm->stringsCount = 0;
vm->stringsDeleted = 0;
}
/* Remove a string from the cache */
void gst_stringcache_remove(Gst *vm, const uint8_t *str) {
int status = 0;
const uint8_t **bucket = gst_stringcache_find(vm, str,
gst_string_length(str),
gst_string_hash(str),
&status);
if (status) {
vm->stringsCount--;
vm->stringsDeleted++;
*bucket = deleted;
}
}
/****/
/* Public C API */
/****/
/* Begin creation of a string */
uint8_t *gst_string_begin(Gst *vm, uint32_t len) {
uint8_t *data = gst_alloc(vm, len + 1 + 2 * sizeof(uint32_t));
data += 2 * sizeof(uint32_t);
gst_string_length(data) = len;
data[len] = 0;
return data;
}
/* Finish building the string. Calculates the hash and deduplicates it */
const uint8_t *gst_string_end(Gst *vm, uint8_t *str) {
int status = 0;
const uint8_t **bucket;
uint32_t hash, len;
len = gst_string_length(str);
hash = gst_string_hash(str) = gst_string_calchash(str, len);
bucket = gst_stringcache_find(vm, str, len, hash, &status);
if (status) {
return *bucket;
} else {
if ((vm->stringsCount + vm->stringsDeleted) * 2 > vm->stringsCapacity) {
gst_stringcache_resize(vm, vm->stringsCount * 4);
bucket = gst_stringcache_find(vm, str, len, hash, &status);
}
/* Mark the memory as string memory */
gst_mem_tag(gst_string_raw(str), GST_MEMTAG_STRING);
vm->stringsCount++;
*bucket = str;
return str;
}
}
/* Loads a constant buffer as a string into a gst vm */
const uint8_t *gst_string_loadbuffer(Gst *vm, const uint8_t *buf, uint32_t len) {
int status = 0;
const uint8_t **bucket;
uint32_t hash;
hash = gst_string_calchash(buf, len);
bucket = gst_stringcache_find(vm, buf, len, hash, &status);
if (status) {
return *bucket;
} else {
uint8_t *str;
if ((vm->stringsCount + vm->stringsDeleted) * 2 > vm->stringsCapacity) {
gst_stringcache_resize(vm, vm->stringsCount * 4);
bucket = gst_stringcache_find(vm, buf, len, hash, &status);
}
vm->stringsCount++;
str = gst_string_begin(vm, len);
gst_memcpy(str, buf, len);
gst_string_hash(str) = hash;
/* Mark the memory as string memory */
gst_mem_tag(gst_string_raw(str), GST_MEMTAG_STRING);
*bucket = str;
return str;
}
}
/* Converts a c style string to a gst string */
const uint8_t *gst_cstring_to_string(Gst *vm, const char *cstring) {
uint32_t len = 0;
while (cstring[len]) ++len;
return gst_string_loadbuffer(vm, (const uint8_t *)cstring, len);
}
/* Load a c string into a GST string */
GstValue gst_load_cstring(Gst *vm, const char *string) {
GstValue ret;
ret.type = GST_STRING;
ret.data.string = gst_cstring_to_string(vm, string);
return ret;
}
/* Compares two strings */
int gst_string_compare(const uint8_t *lhs, const uint8_t *rhs) {
@ -230,7 +10,7 @@ int gst_string_compare(const uint8_t *lhs, const uint8_t *rhs) {
if (lhs[i] == rhs[i]) {
continue;
} else if (lhs[i] < rhs[i]) {
return -1; /* x is less then y */
return -1; /* x is less than y */
} else {
return 1; /* y is less than x */
}

6
core/thread.c
View File

@ -68,14 +68,14 @@ void gst_thread_tuplepack(Gst *vm, GstThread *thread, uint32_t n) {
gst_thread_pushnil(vm, thread, n - size + 1);
stack = thread->data + thread->count;
stack[n].type = GST_TUPLE;
stack[n].data.tuple = gst_tuple(vm, 0);
stack[n].data.tuple = gst_tuple_end(vm, gst_tuple_begin(vm, 0));
} else {
uint32_t i;
GstValue *tuple = gst_tuple(vm, size - n);
GstValue *tuple = gst_tuple_begin(vm, size - n);
for (i = n; i < size; ++i)
tuple[i - n] = stack[i];
stack[n].type = GST_TUPLE;
stack[n].data.tuple = tuple;
stack[n].data.tuple = gst_tuple_end(vm, tuple);
gst_frame_size(stack) = n + 1;
}
}

209
core/value.c
View File

@ -13,7 +13,7 @@ static const uint8_t *number_to_string(Gst *vm, GstNumber x) {
uint8_t buf[GST_BUFSIZE];
/* TODO - not depend on stdio */
int count = snprintf((char *) buf, GST_BUFSIZE, "%.21g", x);
return gst_string_loadbuffer(vm, buf, (uint32_t) count);
return gst_string_b(vm, buf, (uint32_t) count);
}
static const char *HEX_CHARACTERS = "0123456789abcdef";
@ -44,7 +44,7 @@ static const uint8_t *string_description(Gst *vm, const char *title, void *point
*c++ = HEX(byte & 0xF);
}
*c++ = '>';
return gst_string_loadbuffer(vm, buf, c - buf);
return gst_string_b(vm, buf, c - buf);
}
#undef GST_BUFSIZE
@ -52,52 +52,44 @@ static const uint8_t *string_description(Gst *vm, const char *title, void *point
/* Returns a string pointer or NULL if could not allocate memory. */
const uint8_t *gst_to_string(Gst *vm, GstValue x) {
switch (x.type) {
case GST_NIL:
return gst_cstring_to_string(vm, "nil");
case GST_BOOLEAN:
if (x.data.boolean) {
return gst_cstring_to_string(vm, "true");
} else {
return gst_cstring_to_string(vm, "false");
}
case GST_NUMBER:
return number_to_string(vm, x.data.number);
case GST_ARRAY:
return string_description(vm, "array", x.data.pointer);
case GST_TUPLE:
return string_description(vm, "tuple", x.data.pointer);
case GST_OBJECT:
return string_description(vm, "object", x.data.pointer);
case GST_STRING:
return x.data.string;
case GST_BYTEBUFFER:
return string_description(vm, "buffer", x.data.pointer);
case GST_CFUNCTION:
return string_description(vm, "cfunction", x.data.pointer);
case GST_FUNCTION:
return string_description(vm, "function", x.data.pointer);
case GST_THREAD:
return string_description(vm, "thread", x.data.pointer);
case GST_USERDATA:
return string_description(vm, "userdata", x.data.pointer);
case GST_FUNCENV:
return string_description(vm, "funcenv", x.data.pointer);
case GST_FUNCDEF:
return string_description(vm, "funcdef", x.data.pointer);
case GST_NIL:
return gst_string_c(vm, "nil");
case GST_BOOLEAN:
if (x.data.boolean) {
return gst_string_c(vm, "true");
} else {
return gst_string_c(vm, "false");
}
case GST_NUMBER:
return number_to_string(vm, x.data.number);
case GST_ARRAY:
return string_description(vm, "array", x.data.pointer);
case GST_TUPLE:
return string_description(vm, "tuple", x.data.pointer);
case GST_STRUCT:
return string_description(vm, "struct", x.data.pointer);
case GST_OBJECT:
return string_description(vm, "object", x.data.pointer);
case GST_STRING:
return x.data.string;
case GST_BYTEBUFFER:
return string_description(vm, "buffer", x.data.pointer);
case GST_CFUNCTION:
return string_description(vm, "cfunction", x.data.pointer);
case GST_FUNCTION:
return string_description(vm, "function", x.data.pointer);
case GST_THREAD:
return string_description(vm, "thread", x.data.pointer);
case GST_USERDATA:
return string_description(vm, "userdata", x.data.pointer);
case GST_FUNCENV:
return string_description(vm, "funcenv", x.data.pointer);
case GST_FUNCDEF:
return string_description(vm, "funcdef", x.data.pointer);
}
return NULL;
}
/* Simple hash function to get tuple hash */
static uint32_t tuple_calchash(GstValue *tuple) {
uint32_t i;
uint32_t count = gst_tuple_length(tuple);
uint32_t hash = 5387;
for (i = 0; i < count; ++i)
hash = (hash << 5) + hash + gst_hash(tuple[i]);
return hash;
}
/* Check if two values are equal. This is strict equality with no conversion. */
int gst_equals(GstValue x, GstValue y) {
int result = 0;
@ -105,40 +97,19 @@ int gst_equals(GstValue x, GstValue y) {
result = 0;
} else {
switch (x.type) {
case GST_NIL:
result = 1;
break;
case GST_BOOLEAN:
result = (x.data.boolean == y.data.boolean);
break;
case GST_NUMBER:
result = (x.data.number == y.data.number);
break;
case GST_TUPLE:
if (x.data.tuple == y.data.tuple) {
result = 1;
break;
}
if (gst_hash(x) != gst_hash(y) ||
gst_tuple_length(x.data.string) != gst_tuple_length(y.data.string)) {
result = 0;
break;
}
result = 1;
{
uint32_t i;
for (i = 0; i < gst_tuple_length(x.data.tuple); ++i) {
if (!gst_equals(x.data.tuple[i], y.data.tuple[i])) {
result = 0;
break;
}
}
}
break;
default:
/* compare pointers */
result = (x.data.pointer == y.data.pointer);
break;
case GST_NIL:
result = 1;
break;
case GST_BOOLEAN:
result = (x.data.boolean == y.data.boolean);
break;
case GST_NUMBER:
result = (x.data.number == y.data.number);
break;
default:
/* compare pointers */
result = (x.data.pointer == y.data.pointer);
break;
}
}
return result;
@ -148,43 +119,43 @@ int gst_equals(GstValue x, GstValue y) {
uint32_t gst_hash(GstValue x) {
uint32_t hash = 0;
switch (x.type) {
case GST_NIL:
hash = 0;
break;
case GST_BOOLEAN:
hash = x.data.boolean;
break;
case GST_NUMBER:
{
union {
uint32_t hash;
GstNumber number;
} u;
u.number = x.data.number;
hash = u.hash;
}
break;
/* String hashes */
case GST_STRING:
hash = gst_string_hash(x.data.string);
break;
case GST_TUPLE:
if (gst_tuple_hash(x.data.tuple))
hash = gst_tuple_hash(x.data.tuple);
else
hash = gst_tuple_hash(x.data.tuple) = tuple_calchash(x.data.tuple);
break;
default:
/* Cast the pointer */
{
union {
void * pointer;
uint32_t hash;
} u;
u.pointer = x.data.pointer;
hash = u.hash;
}
break;
case GST_NIL:
hash = 0;
break;
case GST_BOOLEAN:
hash = x.data.boolean;
break;
case GST_NUMBER:
{
union {
uint32_t hash;
GstNumber number;
} u;
u.number = x.data.number;
hash = u.hash;
}
break;
/* String hashes */
case GST_STRING:
hash = gst_string_hash(x.data.string);
break;
case GST_TUPLE:
hash = gst_tuple_hash(x.data.tuple);
break;
case GST_STRUCT:
hash = gst_struct_hash(x.data.st);
break;
default:
/* Cast the pointer */
{
union {
void * pointer;
uint32_t hash;
} u;
u.pointer = x.data.pointer;
hash = u.hash;
}
break;
}
return hash;
}
@ -304,6 +275,9 @@ const char *gst_get(GstValue ds, GstValue key, GstValue *out) {
ret.type = GST_NUMBER;
ret.data.number = ds.data.string[index];
break;
case GST_STRUCT:
ret = gst_struct_get(ds.data.st, key);
break;
case GST_OBJECT:
ret = gst_object_get(ds.data.object, key);
break;
@ -346,7 +320,7 @@ int gst_length(Gst *vm, GstValue x, GstValue *len) {
uint32_t length;
switch (x.type) {
default:
vm->ret = gst_load_cstring(vm, "cannot get length");
vm->ret = gst_string_cv(vm, "cannot get length");
return GST_RETURN_ERROR;
case GST_STRING:
length = gst_string_length(x.data.string);
@ -360,6 +334,9 @@ int gst_length(Gst *vm, GstValue x, GstValue *len) {
case GST_TUPLE:
length = gst_tuple_length(x.data.tuple);
break;
case GST_STRUCT:
length = gst_struct_length(x.data.st);
break;
case GST_OBJECT:
length = x.data.object->count;
break;

29
core/vm.c
View File

@ -1,5 +1,4 @@
#include <gst/gst.h>
#include "stringcache.h"
/* Macros for errors in the vm */
@ -7,7 +6,7 @@
#define gst_exit(vm, r) return ((vm)->ret = (r), GST_RETURN_OK)
/* Bail from the VM with an error string. */
#define gst_error(vm, e) do { (vm)->ret = gst_load_cstring((vm), (e)); goto vm_error; } while (0)
#define gst_error(vm, e) do { (vm)->ret = gst_string_cv((vm), (e)); goto vm_error; } while (0)
/* Crash. Not catchable, unlike error. */
#define gst_crash(vm, e) return ((vm)->crash = (e), GST_RETURN_CRASH)
@ -229,8 +228,9 @@ static int gst_continue_size(Gst *vm, uint32_t stackBase) {
offset = isTCall ? 3 : 4;
arity = pc[offset - 1];
/* Push new frame */
if (temp.type != GST_FUNCTION && temp.type != GST_CFUNCTION)
gst_error(vm, GST_EXPECTED_FUNCTION);
stack = gst_thread_beginframe(vm, &thread, temp, arity);
if (stack == NULL) gst_error(vm, "expected function");
oldStack = stack - GST_FRAME_SIZE - gst_frame_prevsize(stack);
/* Write arguments */
size = gst_frame_size(stack);
@ -389,11 +389,11 @@ static int gst_continue_size(Gst *vm, uint32_t stackBase) {
{
uint32_t i;
uint32_t len = pc[2];
GstValue *tuple = gst_tuple(vm, len);
GstValue *tuple = gst_tuple_begin(vm, len);
for (i = 0; i < len; ++i)
tuple[i] = stack[pc[3 + i]];
temp.type = GST_TUPLE;
temp.data.tuple = tuple;
temp.data.tuple = gst_tuple_end(vm, tuple);
stack[pc[1]] = temp;
pc += 3 + len;
}
@ -504,10 +504,16 @@ void gst_init(Gst *vm) {
vm->black = 0;
/* Add thread */
vm->thread = NULL;
/* Set up string cache */
gst_stringcache_init(vm, 128);
/* Set up global env */
vm->rootenv = NULL;
/* Set up scratch memory */
vm->scratch = NULL;
vm->scratch_len = 0;
/* Set up the cache */
vm->cache = gst_raw_calloc(1, 128 * sizeof(GstValue));
vm->cache_capacity = vm->cache == NULL ? 0 : 128;
vm->cache_count = 0;
vm->cache_deleted = 0;
}
/* Clear all memory associated with the VM */
@ -516,5 +522,12 @@ void gst_deinit(Gst *vm) {
vm->thread = NULL;
vm->rootenv = NULL;
vm->ret.type = GST_NIL;
gst_stringcache_deinit(vm);
vm->scratch = NULL;
vm->scratch_len = 0;
/* Deinit the cache */
gst_raw_free(vm->cache);
vm->cache = NULL;
vm->cache_count = 0;
vm->cache_capacity = 0;
vm->cache_deleted = 0;
}

46
include/gst/gst.h
View File

@ -16,7 +16,7 @@
/* Struct utils */
#define gst_struct_raw(t) ((uint32_t *)(t) - 2)
#define gst_struct_length(t) (gst_struct_raw(t)[0])
#define gst_struct_capacity(t) (gst_struct_length(t) * 3)
#define gst_struct_capacity(t) (gst_struct_length(t) * 4)
#define gst_struct_hash(t) (gst_struct_raw(t)[1])
/* Memcpy for moving memory */
@ -78,7 +78,7 @@
#define gst_c_throw(vm, e) do { (vm)->ret = (e); return GST_RETURN_ERROR; } while (0)
/* Throw c string error from a c function */
#define gst_c_throwc(vm, e) gst_c_throw((vm), gst_load_cstring((vm), (e)))
#define gst_c_throwc(vm, e) gst_c_throw((vm), gst_string_cv((vm), (e)))
/* Assert from a c function */
#define gst_c_assert(vm, cond, e) do {if (cond) gst_c_throw((vm), (e)); } while (0)
@ -101,6 +101,7 @@ typedef enum GstType {
GST_STRING,
GST_ARRAY,
GST_TUPLE,
GST_STRUCT,
GST_THREAD,
GST_BYTEBUFFER,
GST_FUNCTION,
@ -153,12 +154,12 @@ union GstValueUnion {
GstBuffer *buffer;
GstObject *object;
GstThread *thread;
GstValue *tuple;
const GstValue *tuple;
GstCFunction cfunction;
GstFunction *function;
GstFuncEnv *env;
GstFuncDef *def;
GstValue *st;
const GstValue *st;
const uint8_t *string;
const char *cstring; /* Alias for ease of use from c */
/* Indirectly used union members */
@ -264,11 +265,14 @@ struct Gst {
uint32_t memoryInterval;
uint32_t nextCollection;
uint32_t black : 1;
/* String cache */
const uint8_t **strings;
uint32_t stringsCapacity;
uint32_t stringsCount;
uint32_t stringsDeleted;
/* Immutable value cache */
GstValue *cache;
uint32_t cache_capacity;
uint32_t cache_count;
uint32_t cache_deleted;
/* Scratch memory */
char *scratch;
uint32_t scratch_len;
/* Thread */
GstThread *thread;
/* A GC root */
@ -345,11 +349,18 @@ void gst_array_ensure(Gst *vm, GstArray *array, uint32_t capacity);
void gst_array_push(Gst *vm, GstArray *array, GstValue x);
GstValue gst_array_pop(GstArray *array);
/****/
/* Userdata functions */
/****/
void *gst_userdata(Gst *vm, uint32_t size, GstObject *meta);
/****/
/* Tuple functions */
/****/
GstValue *gst_tuple(Gst *vm, uint32_t length);
GstValue *gst_tuple_begin(Gst *vm, uint32_t length);
const GstValue *gst_tuple_end(Gst *vm, GstValue *tuple);
/****/
/* String functions */
@ -357,16 +368,19 @@ GstValue *gst_tuple(Gst *vm, uint32_t length);
uint8_t *gst_string_begin(Gst *vm, uint32_t len);
const uint8_t *gst_string_end(Gst *vm, uint8_t *str);
const uint8_t *gst_string_loadbuffer(Gst *vm, const uint8_t *buf, uint32_t len);
const uint8_t *gst_cstring_to_string(Gst *vm, const char *cstring);
GstValue gst_load_cstring(Gst *vm, const char *string);
const uint8_t *gst_string_b(Gst *vm, const uint8_t *buf, uint32_t len);
const uint8_t *gst_string_c(Gst *vm, const char *cstring);
GstValue gst_string_cv(Gst *vm, const char *string);
int gst_string_compare(const uint8_t *lhs, const uint8_t *rhs);
/****/
/* Userdata functions */
/* Struct functions */
/****/
void *gst_userdata(Gst *vm, uint32_t size, GstObject *meta);
GstValue *gst_struct_begin(Gst *vm, uint32_t count);
void gst_struct_put(GstValue *st, GstValue key, GstValue value);
const GstValue *gst_struct_end(Gst *vm, GstValue *st);
GstValue gst_struct_get(const GstValue *st, GstValue key);
/****/
/* Object functions */
@ -453,6 +467,8 @@ const char *gst_serialize(Gst *vm, GstBuffer *buffer, GstValue x);
/****/
#define GST_MEMTAG_STRING 4
#define GST_MEMTAG_TUPLE 8
#define GST_MEMTAG_STRUCT 16
void gst_mark_value(Gst *vm, GstValue x);
void gst_mark(Gst *vm, GstValueUnion x, GstType type);