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finalizers; merge package malloc into package runtime

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R=r, cw
CC=golang-dev
https://golang.org/cl/198085
This commit is contained in:
Russ Cox 2010-02-03 16:31:34 -08:00
parent 00f4c6a1b5
commit 33e396a4a7
20 changed files with 554 additions and 243 deletions
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46
src/pkg/runtime/malloc.cgo
View file

@ -6,10 +6,11 @@
//
// TODO(rsc): double-check stats.
package malloc
package runtime
#include "runtime.h"
#include "malloc.h"
#include "defs.h"
#include "type.h"
MHeap mheap;
MStats mstats;
@ -96,8 +97,10 @@ free(void *v)
throw("malloc/free - deadlock");
m->mallocing = 1;
if(!mlookup(v, nil, nil, &ref))
if(!mlookup(v, nil, nil, &ref)) {
printf("free %p: not an allocated block\n", v);
throw("free mlookup");
}
*ref = RefFree;
// Find size class for v.
@ -274,10 +277,41 @@ func Lookup(p *byte) (base *byte, size uintptr) {
mlookup(p, &base, &size, nil);
}
func GetStats() (s *MStats) {
s = &mstats;
}
func GC() {
gc(1);
}
func SetFinalizer(obj Eface, finalizer Eface) {
byte *base;
uintptr size;
FuncType *ft;
if(obj.type == nil) {
printf("runtime.SetFinalizer: first argument is nil interface\n");
throw:
throw("runtime.SetFinalizer");
}
if(obj.type->kind != KindPtr) {
printf("runtime.SetFinalizer: first argument is %S, not pointer\n", *obj.type->string);
goto throw;
}
if(!mlookup(obj.data, &base, &size, nil) || obj.data != base) {
printf("runtime.SetFinalizer: pointer not at beginning of allocated block\n");
goto throw;
}
if(finalizer.type != nil) {
if(finalizer.type->kind != KindFunc) {
badfunc:
printf("runtime.SetFinalizer: second argument is %S, not func(%S)\n", *finalizer.type->string, *obj.type->string);
goto throw;
}
ft = (FuncType*)finalizer.type;
if(ft->dotdotdot || ft->out.len != 0 || ft->in.len != 1 || *(Type**)ft->in.array != obj.type)
goto badfunc;
if(getfinalizer(obj.data, 0)) {
printf("runtime.SetFinalizer: finalizer already set");
goto throw;
}
}
addfinalizer(obj.data, finalizer.data);
}