mirror of
https://github.com/janet-lang/janet
synced 2024-12-26 00:10:27 +00:00
Initial rewrite of compiler
This commit is contained in:
bakpakin
parent
a2ee6ffe5c
commit
1293d2e301
2
Makefile
2
Makefile
@ -31,7 +31,7 @@ PREFIX=/usr/local
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DST_TARGET=dst
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DST_XXD=xxd
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DEBUGGER=lldb
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DST_INTERNAL_HEADERS=$(addprefix core/,symcache.h opcodes.h strtod.h)
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DST_INTERNAL_HEADERS=$(addprefix core/,symcache.h opcodes.h strtod.h compile.h)
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DST_HEADERS=$(addprefix include/dst/,dst.h)
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#############################
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377
core/compile.c
377
core/compile.c
@ -21,76 +21,333 @@
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*/
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#include <dst/dst.h>
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#include "compile.h"
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#define DST_LOCAL_FLAG_MUTABLE 1
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static void dst_compile_cleanup(DstCompiler *c) {
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/* Compiler typedefs */
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typedef struct DstCompiler DstCompiler;
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typedef struct FormOptions FormOptions;
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typedef struct SlotTracker SlotTracker;
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typedef struct DstScope DstScope;
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typedef struct DstCFunctionOptimizer DstCFunctionOptimizer;
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#define DST_SLOT_CONSTANT 1
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#define DST_SLOT_TEMP 2
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#define DST_SLOT_RETURNED 4
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#define DST_SLOT_NIL 8
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/* A stack slot */
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struct DstSlot {
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int32_t index;
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uint32_t flags;
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uint32_t types; /* bit set of possible primitive types */
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DstValue constant; /* If the slot has a constant value */
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}
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/* Most forms that return a constant will not generate any bytecode */
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DstSlot dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m) {
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DstSlot ret;
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c->error_start = dst_unwrap_integer(sourcemap[0]);
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c->error_end = dst_unwrap_integer(sourcemap[1]);
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c->error = m;
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ret.flags = DST_SLOT_ERROR;
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ret.index = 0;
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ret.constant = dst_wrap_nil();
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return ret;
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}
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/* Special forms that need support */
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/* cond
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* while (continue, break)
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* quote
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* fn
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* def
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* var
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* do
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DstSlot dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m) {
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return dst_compile_error(c, sourcemap, dst_cstring(m));
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}
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/* Use these to get sub options. They will traverse the source map so
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* compiler errors make sense. Then modify the returned options. */
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DstFormOptions dst_compile_getopts_index(DstFormOptions opts, int32_t index) {
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DstCompiler *c = opts.compiler;
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const DstValue *sourcemap = dst_parse_submap_index(opts.sourcemap, index);
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DstValue nextval = dst_getindex(opts.x, index);
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opts.x = nextval;
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opts.sourcemap = sourcemap;
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return opts;
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}
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DstFormOptions dst_compile_getopts_key(DstFormOptions opts, DstValue key) {
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DstCompiler *c = opts.compiler;
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const DstValue *sourcemap = dst_parse_submap_key(opts.sourcemap, key);
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opts.x = key;
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opts.sourcemap = sourcemap;
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return opts;
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}
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DstFormOptions dst_compile_getopts_value(DstFormOptions opts, DstValue key) {
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DstCompiler *c = opts.compiler;
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const DstValue *sourcemap = dst_parse_submap_value(opts.sourcemap, key);
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DstValue nextval = dst_get(opts.x, key);
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opts.x = nextval;
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opts.sourcemap = sourcemap;
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return opts;
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}
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/* Eneter a new scope */
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void dst_compile_scope(DstCompiler *c, int newfn) {
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DstScope *scope;
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if (c->scopecap < c->scopecount) {
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c->scopes = realloc(c->scopes, 2 * sizeof(DstScope) * c->scopecount + 2);
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if (NULL == c->scope) {
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DST_OUT_OF_MEMORY;
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}
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}
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scope = c->scopes + c->scopecount++;
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dst_array_init(&scope->constants, 0);
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dst_table_init(&scope->symbols, 4);
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scope->envs = NULL;
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scope->envcount = 0;
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scope->envcap = 0;
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scope->slots = NULL;
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scope->slotcount = 0;
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scope->slotcap = 0;
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scope->freeslots = NULL;
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scope->freeslotcount = 0;
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scope->freeslotcap = 0;
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scope->buffer_offset = c->buffer.count;
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scope->nextslot = 0;
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scope->lastslot = -1;
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scope->flags = newfn ? DST_SCOPE_FUNCTION : 0;
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}
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DstSlot dst_slot_nil() {
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DstSlot ret;
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ret.index = 0;
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ret.flags = (1 << DST_TYPE_NIL) | DST_SLOT_CONSTANT;
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ret.constant = dst_wrap_nil();
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return ret;
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}
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/* Leave a scope. Does not build closure*/
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void dst_compile_popscope(DstCompiler *c) {
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DstScope *scope;
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DstSlot ret;
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dst_assert(c->scopecount, "could not pop scope");
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scope = c->scopes + --c->scopecount;
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/* Move free slots to parent scope if not a new function */
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if (!(scope->flags & DST_SCOPE_FUNCTION) && c->scopecount) {
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int32_t i;
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int32_t newcount;
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DstScope *topscope = c->scopes + c->scopecount - 1;
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topscope->nextslot = scope->nextslot;
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newcount = topscope->freeslotcount + scope->freeslotcount;
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if (topscope->freeslotcap < newcount) {
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topscope->freeslots = realloc(topscope->freeslot, sizeof(int32_t) * newcount);
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if (NULL == topscope->freeslots) {
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DST_OUT_OF_MEMORY;
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}
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topscope->freeslotcap = newcount;
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}
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memcpy(
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topscope->freeslots + topescope->freeslotcount,
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scope->freeslots,
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sizeof(int32_t) * scope->freeslotcount);
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topscope->freeslotcount = newcount;
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}
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dst_table_deinit(&scope->symbols);
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dst_array_deinit(&scope->constants);
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free(scope->slots);
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free(scope->freeslots);
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free(scope->envs);
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return ret;
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}
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#define dst_compile_topscope(c) ((c)->scopes + (c)->scopecount - 1)
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/* Allocate a slot space */
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static int32_t dst_compile_slotalloc(DstCompiler *c) {
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DstScope *scope = dst_compile_topscope(c);
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if (scope->freeslotcount == 0) {
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return scope->nextslot++;
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} else {
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return scope->freeslots[--scope->freeslotcount];
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}
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}
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int dst_compile_slotmatch(DstFormOptions opts, DstSlot slot) {
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return opts.type & slot.type;
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}
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DstSlot dst_compile_normalslot(DstCompiler *c, uint32_t flags) {
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DstSlot ret;
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int32_t index = dst_compile_slotalloc(c);
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ret.flags = flags;
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ret.constant = dst_wrap_nil();
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ret.index = index;
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ret.envindex = 0;
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return ret;
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}
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DstSlot dst_compile_constantslot(DstCompiler *c, DstValue x) {
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DstSlot ret;
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ret.flags = (1 << dst_type(x)) | DST_SLOT_CONSTANT;
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ret.index = -1;
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ret.constant = x;
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ret.envindex = 0;
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return ret;
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}
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/* Free a single slot */
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void dst_compile_freeslot(DstCompiler *c, DstSlot slot) {
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DstScope *scope = dst_compile_topscope(c);
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int32_t newcount = scope->freeslotcount + 1;
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if (slot.flags & (DST_SLOT_CONSTANT | DST_SLOT_ERROR))
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return;
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if (scope->freeslotcap < newcount) {
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int32_t newcap = 2 * newcount;
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scope->freeslots = realloc(scope->freeslots, sizeof(int32_t) * newcap);
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if (NULL == scope->freeslots) {
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DST_OUT_OF_MEMORY;
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}
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scope->freeslotcap = newcap;
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}
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scope->freeslots[scope->freeslotcount] = slot.index;
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scope->freeslotcount = newcount;
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}
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/* Free an array of slots */
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void dst_compile_freeslotarray(DstCompiler *c, DstArray *slots) {
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int32_t i;
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for (i = 0; i < slots->count; i++) {
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dst_compile_freeslot(c, slots->data[i]);
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}
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}
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/*
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* The mechanism for passing environments to to closures is a bit complicated,
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* but ensures a few properties.
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* * Environments are on the stack unless they need to be closurized
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* * Environments can be shared between closures
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* * A single closure can access any of multiple parent environments in constant time (no linked lists)
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*
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* FuncDefs all have a list of a environment indices that are inherited from the
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* parent function, as well as a flag indicating if the closures own stack variables
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* are needed in a nested closure. The list of indices says which of the parent environments
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* go into which environment slot for the new closure. This allows closures to use whatever environments
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* they need to, as well as pass these environments to sub closures. To access the direct parent's environment,
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* the FuncDef must copy the 0th parent environment. If a closure does not need to export it's own stack
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* variables for creating closures, it must keep the 0th entry in the env table to NULL.
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*
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* TODO - check if this code is bottle neck and search for better data structures.
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*/
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#define DST_OPTIMIZER_CONSTANTS 1
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#define DST_OPTIMIZER_BYTECODE 2
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#define DST_OPTIMIZER_PARTIAL_CONSTANTS 4
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/* Allow searching for symbols. Return information about the symbol */
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DstSlot dst_compile_resolve(
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DstCompiler *c,
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const DstValue *sourcemap,
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const uint8_t *sym) {
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/* A grouping of optimization on a cfunction given certain conditions
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* on the arguments (such as all constants, or some known types). The appropriate
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* optimizations should be tried before compiling a normal function call. */
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struct DstCFunctionOptimizer {
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uint32_t flags; /* Indicate what kind of optimizations can be performed */
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DstSlot ret;
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DstScope *scope = dst_compile_topscope(c);
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int32_t env_index = 0;
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int foundlocal;
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/* Search scopes for symbol, starting from top */
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while (scope >= c->scopes) {
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DstValue check = dst_table_get(scope->symbols, dst_wrap_symbol(sym));
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if (dst_checktype(check, DST_INTEGER)) {
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ret = scope->slots[dst_unwrap_integer(check)];
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goto found;
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}
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scope--;
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}
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/* Symbol not found */
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return dst_compile_error(c, sourcemap, dst_formatc("unknown symbol %q", sym));
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/* Symbol was found */
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found:
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/* Constants and errors can be returned immediately (they are stateless) */
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if (ret.flags & (DST_SLOT_CONSTANT | DST_SLOT_ERROR))
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return ret;
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/* non-local scope needs to expose its environment */
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foundlocal = scope == dst_compile_topscope(c);
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if (!foundlocal) {
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scope->flags |= DST_SCOPE_ENV;
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if (scope->envcount < 1) {
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scope->envcount = 1;
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scope->envs = malloc(sizeof(int32_t) * 10);
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if (NULL == scope->envs) {
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DST_OUT_OF_MEMORY;
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}
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scope->envcap = 10;
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scope->envs[0] = -1;
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}
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scope++;
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}
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/* Propogate env up to current scope */
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while (scope <= dst_compile_topscope(c)) {
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int32_t j;
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int32_t newcount = scope->envcount + 1;
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int scopefound = 0;
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/* Check if scope already has env. If so, break */
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for (j = 1; j < scope->envcount; j++) {
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if (scope->envs[j] == env_index) {
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scopefound = 1;
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env_index = j;
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break;
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}
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}
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if (!scopefound) {
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env_index = scope->envcount;
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/* Ensure capacity for adding scope */
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if (newcount > scope->envcap) {
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int32_t newcap = 2 * newcount;
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scope->envs = realloc(scope->envs, sizeof(int32_t) * newcap);
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if (NULL == scope->envs) {
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DST_OUT_OF_MEMORY;
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}
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scope->envcap = newcap;
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}
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scope->envs[scope->envcount] = env_index;
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scope->envcount = newcount;
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}
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scope++;
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}
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/* Take the slot from the upper scope, and set its envindex before returning. */
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if (!foundlocal) {
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ret.envindex = env_index;
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}
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return ret;
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}
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/* A lexical scope during compilation */
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struct DstScope {
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DstArray slots;
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DstArray freeslots;
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DstArray constants;
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DstTable symbols; /* Positive numbers are stack slots, negative are negative constant indices */
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uint32_t flags;
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int32_t nextslot;
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/* Compile an array */
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/* Compile a single value */
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DstSlot dst_compile_value(DstFormOptions opts) {
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DstSlot ret;
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if (opts.compiler->recursion_guard <= 0) {
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return dst_compiler_cerror(opts.compiler, opts.sourcemap, "recursed too deeply");
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}
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opts.compiler->recursion_guard--;
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switch (dst_type(opts.x)) {
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default:
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ret = dst_compile_constantslot(opts.x);
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break;
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case DST_SYMBOL:
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{
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const uint8_t *sym = dst_unwrap_symbol(opts.x);
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if (dst_string_length(sym) > 0 && sym[0] != ':')
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ret = dst_compile_resolve(opts.compiler, opts.sourcemap, sym);
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else
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ret = dst_compile_constantslot(opts.x);
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break;
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}
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case DST_TUPLE:
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ret = dst_compile_tuple(opts);
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break;
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case DST_ARRAY:
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ret = dst_compile_array(opts);
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break;
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case DST_STRUCT:
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ret = dst_compile_struct(opts);
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break;
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case DST_TABLE:
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ret = dst_compile_table(opts);
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break;
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}
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opts.compiler->recursion_guard++;
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return ret;
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}
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/* Compilation state */
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struct DstCompiler {
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DstValue error;
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jmp_buf on_error;
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DstArray scopes;
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DstBuffer buffer;
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int recursion_guard;
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};
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DstSlot dst_compile_targetslot(DstFormOptions opts, DstSlot s);
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/* Compiler state */
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struct DstFormOptions {
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DstCompiler *compiler;
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DstValue x;
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uint32_t flags;
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uint32_t types; /* bit set of accepted primitive types */
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int32_t target_slot;
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};
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/* Coerce any slot into the target slot. If no target is specified, return
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* the slot unaltered. Otherwise, move and load upvalues as necesarry to set the slot. */
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DstSlot dst_compile_coercetargetslot(DstFormOptions opts, DstSlot s);
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220
core/compile.h
Normal file
220
core/compile.h
Normal file
@ -0,0 +1,220 @@
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/*
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* Copyright (c) 2017 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to
|
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* deal in the Software without restriction, including without limitation the
|
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
|
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
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* IN THE SOFTWARE.
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*/
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#ifndef DST_COMPILE_H
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#define DST_COMPILE_H
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#include <dst/dst.h>
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/* Compiler typedefs */
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typedef struct DstCompiler DstCompiler;
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typedef struct FormOptions FormOptions;
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typedef struct SlotTracker SlotTracker;
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typedef struct DstScope DstScope;
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typedef struct DstCFunctionOptimizer DstCFunctionOptimizer;
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#define DST_SLOT_CONSTANT 0x10000
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#define DST_SLOT_TEMP 0x20000
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#define DST_SLOT_RETURNED 0x40000
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#define DST_SLOT_NIL 0x80000
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#define DST_SLOT_MUTABLE 0x100000
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#define DST_SLOT_ERROR 0x200000
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#define DST_SLOTTYPE_ANY 0xFFFF
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/* A stack slot */
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struct DstSlot {
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int32_t index;
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int32_t envindex; /* 0 is local, positive number is an upvalue */
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uint32_t flags;
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DstValue constant; /* If the slot has a constant value */
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}
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|
||||
/* Most forms that return a constant will not generate any bytecode */
|
||||
|
||||
/* Special forms that need support */
|
||||
/* cond
|
||||
* while (continue, break)
|
||||
* quote
|
||||
* fn
|
||||
* def
|
||||
* var
|
||||
* varset
|
||||
* do
|
||||
*/
|
||||
|
||||
#define DST_OPTIMIZER_CONSTANTS 0x10000
|
||||
#define DST_OPTIMIZER_BYTECODE 0x20000
|
||||
#define DST_OPTIMIZER_PARTIAL_CONSTANTS 0x40000
|
||||
#define DST_OPTIMIZER_SYSCALL 0x80000
|
||||
|
||||
/* A grouping of optimization on a cfunction given certain conditions
|
||||
* on the arguments (such as all constants, or some known types). The appropriate
|
||||
* optimizations should be tried before compiling a normal function call. */
|
||||
struct DstCFunctionOptimizer {
|
||||
uint32_t flags; /* Indicate what kind of optimizations can be performed. */
|
||||
/*Also what kind of types can be returned*/
|
||||
int32_t syscall;
|
||||
}
|
||||
|
||||
#define DST_SCOPE_FUNCTION 1
|
||||
#define DST_SCOPE_LASTSLOT 2
|
||||
#define DST_SCOPE_FIRSTSLOT 4
|
||||
#define DST_SCOPE_ENV
|
||||
|
||||
/* A lexical scope during compilation */
|
||||
struct DstScope {
|
||||
DstArray constants; /* Constants for the funcdef */
|
||||
DstTable symbols; /* Map symbols -> Slot inidices */
|
||||
|
||||
/* Hold all slots in use. Data structures that store
|
||||
* slots should link them to this datatstructure */
|
||||
DstSlot *slots;
|
||||
int32_t slotcount;
|
||||
int32_t slotcap;
|
||||
|
||||
/* A vector of freed slots. */
|
||||
int32_t *freeslots;
|
||||
int32_t freeslotcount;
|
||||
int32_t freeslotcap;
|
||||
|
||||
int32_t lastslot;
|
||||
int32_t nextslot;
|
||||
|
||||
/* Referenced closure environemts. The values at each index correspond
|
||||
* to which index to get the environment from in the parent. The enironment
|
||||
* that corresponds to the direct parent's stack will always have value 0. */
|
||||
int32_t *envs;
|
||||
int32_t envcount;
|
||||
int32_t envcap;
|
||||
|
||||
int32_t buffer_offset; /* Where the bytecode for this scope begins */
|
||||
|
||||
uint32_t flags;
|
||||
}
|
||||
|
||||
/* Compilation state */
|
||||
struct DstCompiler {
|
||||
int32_t scopecount;
|
||||
int32_t scopecap;
|
||||
DstScope *scopes;
|
||||
DstBuffer buffer;
|
||||
DstBuffer mapbuffer;
|
||||
int32_t error_start;
|
||||
int32_t error_end;
|
||||
DstValue error;
|
||||
int recursion_guard;
|
||||
};
|
||||
|
||||
#define DST_FOPTS_TAIL 0x10000
|
||||
#define DST_FOPTS_FORCESLOT 0x20000
|
||||
|
||||
/* Compiler state */
|
||||
struct DstFormOptions {
|
||||
DstCompiler *compiler;
|
||||
DstValue x;
|
||||
const DstValue *sourcemap;
|
||||
uint32_t flags; /* bit set of accepted primitive types */
|
||||
};
|
||||
|
||||
typedef enum DstCompileStatus {
|
||||
DST_COMPILE_OK,
|
||||
DST_COMPILE_ERROR
|
||||
} DstCompileStatus;
|
||||
|
||||
/* Results of compilation */
|
||||
typedef struct DstCompileResults {
|
||||
DstCompileStatus status;
|
||||
DstFuncDef *funcdef;
|
||||
const uint8_t *error;
|
||||
} DstCompileResults;
|
||||
|
||||
typedef struct DstCompileOptions {
|
||||
uint32_t flags;
|
||||
const DstValue *sourcemap;
|
||||
DstValue src;
|
||||
int32_t target;
|
||||
};
|
||||
|
||||
/* Compiler handlers. Used to compile different kinds of expressions. */
|
||||
typedef DstSlot (*DstFormCompiler)(DstFormOptions opts);
|
||||
|
||||
/* Dispatch to correct form compiler */
|
||||
DstSlot dst_compile_value(DstFormOptions opts);
|
||||
|
||||
/* Compile basic types */
|
||||
DstSlot dst_compile_constant(DstFormOptions opts);
|
||||
DstSlot dst_compile_symbol(DstFormOptions opts);
|
||||
DstSlot dst_copmile_array(DstFormOptions opts);
|
||||
DstSlot dst_copmile_struct(DstFormOptions opts);
|
||||
DstSlot dst_copmile_table(DstFormOptions opts);
|
||||
|
||||
/* Tuple compiliation will handle much of the work */
|
||||
DstSlot dst_compile_tuple(DstFormOptions opts);
|
||||
|
||||
/* Compile special forms */
|
||||
DstSlot dst_compile_do(DstFormOptions opts);
|
||||
DstSlot dst_compile_fn(DstFormOptions opts);
|
||||
DstSlot dst_compile_cond(DstFormOptions opts);
|
||||
DstSlot dst_compile_while(DstFormOptions opts);
|
||||
DstSlot dst_compile_quote(DstFormOptions opts);
|
||||
DstSlot dst_compile_def(DstFormOptions opts);
|
||||
DstSlot dst_compile_var(DstFormOptions opts);
|
||||
DstSlot dst_compile_varset(DstFormOptions opts);
|
||||
|
||||
/* Compile source code into FuncDef. */
|
||||
DstCompileResults dst_compile(DstCompileOptions opts);
|
||||
|
||||
/****************************************************/
|
||||
|
||||
DstSlot dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m);
|
||||
DstSlot dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m);
|
||||
|
||||
/* Use these to get sub options. They will traverse the source map so
|
||||
* compiler errors make sense. Then modify the returned options. */
|
||||
DstFormOptions dst_compile_getopts_index(DstFormOptions opts, int32_t index);
|
||||
DstFormOptions dst_compile_getopts_key(DstFormOptions opts, DstValue key);
|
||||
DstFormOptions dst_compile_getopts_value(DstFormOptions opts, DstValue key);
|
||||
|
||||
void dst_compile_scope(DstCompiler *c, int newfn);
|
||||
DstSlot dst_compile_popscope(DstCompiler *c);
|
||||
|
||||
int dst_compile_slotmatch(DstFormOptions opts, DstSlot slot);
|
||||
DstSlot dst_compile_normalslot(DstCompiler *c, uint32_t types);
|
||||
DstSlot dst_compile_constantslot(DstCompiler *c, DstValue x);
|
||||
void dst_compile_freeslot(DstCompiler *c, DstSlot slot);
|
||||
void dst_compile_freeslotarray(DstCompiler *c, DstArray *slots);
|
||||
|
||||
/* Search for a symbol */
|
||||
DstSlot dst_compile_resolve(DstCompiler *c, const DstValue *sourcemap, const uint8_t *sym);
|
||||
|
||||
/* Get a local slot that can be used as the desination for whatever is compiling. */
|
||||
DstSlot dst_compile_targetslot(DstFormOptions opts, DstSlot s);
|
||||
|
||||
/* Coerce any slot into the target slot. If no target is specified, return
|
||||
* the slot unaltered. Otherwise, move and load upvalues as necesarry to set the slot. */
|
||||
DstSlot dst_compile_coercetargetslot(DstFormOptions opts, DstSlot s);
|
||||
|
||||
DstSlot dst_compile_realizeslot(DstCompiler *c, DstSlot s);
|
||||
DstSlot dst_compile_returnslot(DstCompiler *c, DstSlot s);
|
||||
|
||||
#endif
|
||||
@ -298,9 +298,7 @@ void *dst_alloc(DstMemoryType type, size_t size) {
|
||||
size_t total = size + sizeof(DstGCMemoryHeader);
|
||||
|
||||
/* Make sure everything is inited */
|
||||
if (NULL == dst_vm_cache) {
|
||||
DST_PLEASE_INIT;
|
||||
}
|
||||
dst_assert(NULL != dst_vm_cache, "please initialize dst before use");
|
||||
void *mem = malloc(total);
|
||||
|
||||
/* Check for bad malloc */
|
||||
|
||||
@ -630,7 +630,7 @@ const uint8_t *dst_formatc(const char *format, ...) {
|
||||
}
|
||||
case 'q':
|
||||
{
|
||||
const uint8_t *str = dst_to_string(va_arg(args, DstValue));
|
||||
const uint8_t *str = va_arg(args, const uint8_t *);
|
||||
dst_escape_string_b(bufp, str);
|
||||
break;
|
||||
}
|
||||
|
||||
@ -85,18 +85,31 @@
|
||||
#define DST_LITTLE_ENDIAN 1
|
||||
#endif
|
||||
|
||||
/* Handle runtime errors */
|
||||
#ifndef dst_exit
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#define dst_exit(m) do { \
|
||||
printf("runtime error at line %d in file %s: %s\n",\
|
||||
__LINE__,\
|
||||
__FILE__,\
|
||||
(m));\
|
||||
exit(-1);\
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
#ifndef DST_NOASSERT
|
||||
#define dst_assert(c, m) do { \
|
||||
if (!(c)) dst_exit((m)); \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
/* What to do when out of memory */
|
||||
#ifndef DST_OUT_OF_MEMORY
|
||||
#include <stdio.h>
|
||||
#define DST_OUT_OF_MEMORY do { printf("out of memory\n"); exit(1); } while (0)
|
||||
#endif
|
||||
|
||||
/* What to do when dst is used in unitialized state */
|
||||
#ifndef DST_PLEASE_INIT
|
||||
#include <stdio.h>
|
||||
#define DST_PLEASE_INIT do { printf("dst is uninitialized\n"); exit(1); } while (0)
|
||||
#endif
|
||||
|
||||
#define DST_INTEGER_MIN INT32_MIN
|
||||
#define DST_INTEGER_MAX INT32_MAX
|
||||
|
||||
@ -717,13 +730,16 @@ enum DstMemoryType {
|
||||
void *dst_alloc(DstMemoryType type, size_t size);
|
||||
#define dst_enablegc(m) dst_gc_header(m)->flags &= ~DST_MEM_DISABLED
|
||||
|
||||
/* When doing C interop, it is often needed to disable GC on a value.
|
||||
* This is needed when a garbage collection could occur in the middle
|
||||
* of a c function. This could happen, for example, if one calls back
|
||||
* into dst inside of a c function. The pin and unpin functions toggle
|
||||
* garbage collection on a value when needed. Note that no dst functions
|
||||
* will call gc when you don't want it to. GC only happens automatically
|
||||
* in the interpreter loop. */
|
||||
/* When doing C interop, it is often needed to disable GC on a value. This is
|
||||
* needed when a garbage collection could occur in the middle of a c function.
|
||||
* This could happen, for example, if one calls back into dst inside of a c
|
||||
* function. The pin and unpin functions toggle garbage collection on a value
|
||||
* when needed. Note that no dst functions will call gc when you don't want it
|
||||
* to. GC only happens automatically in the interpreter loop. Pinning values
|
||||
* wil NOT recursively pin sub values.
|
||||
*
|
||||
* Be careful whennig bypassing garbage collection like this. It can easily
|
||||
* lead to memory leaks or other undesirable side effects. */
|
||||
void dst_pin(DstValue x);
|
||||
void dst_unpin(DstValue x);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user