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https://github.com/golang/go
synced 2024-09-30 08:18:40 -06:00
fc46931442
Now it's two allocations. I don't see much downside to that, since the two pieces were in different cache lines anyway. Rename 'conservative' to 'cgo_conservative_type' and make clear that _cgo_allocate is the only allowed user. This depends on CL 141490043, which removes the other use of conservative (in defer). LGTM=dvyukov, iant R=khr, dvyukov, iant CC=golang-codereviews, rlh https://golang.org/cl/139610043
71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build gc
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#include "_cgo_export.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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/* Test calling panic from C. This is what SWIG does. */
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extern void crosscall2(void (*fn)(void *, int), void *, int);
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extern void _cgo_panic(void *, int);
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extern void _cgo_allocate(void *, int);
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void
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callPanic(void)
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{
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struct { const char *p; } a;
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a.p = "panic from C";
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crosscall2(_cgo_panic, &a, sizeof a);
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*(int*)1 = 1;
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}
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/* Test calling cgo_allocate from C. This is what SWIG does. */
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typedef struct List List;
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struct List
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{
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List *next;
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int x;
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};
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void
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callCgoAllocate(void)
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{
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int i;
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struct { size_t n; void *ret; } a;
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List *l, *head, **tail;
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head = 0;
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tail = &head;
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for(i=0; i<100; i++) {
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a.n = sizeof *l;
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crosscall2(_cgo_allocate, &a, sizeof a);
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l = a.ret;
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l->x = i;
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l->next = 0;
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*tail = l;
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tail = &l->next;
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}
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gc();
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l = head;
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for(i=0; i<100; i++) {
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if(l->x != i) {
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fprintf(stderr, "callCgoAllocate: lost memory\n");
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exit(2);
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}
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l = l->next;
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}
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if(l != 0) {
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fprintf(stderr, "callCgoAllocate: lost memory\n");
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exit(2);
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}
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}
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