github.com/ader1990/go@v0.0.0-20140630135419-8c24447fa791/src/pkg/runtime/cgo/gcc_util.c (about)

     1  // Copyright 2009 The Go Authors.  All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include "libcgo.h"
     6  
     7  /* Stub for calling malloc from Go */
     8  void
     9  x_cgo_malloc(void *p)
    10  {
    11  	struct a {
    12  		long long n;
    13  		void *ret;
    14  	} *a = p;
    15  
    16  	a->ret = malloc(a->n);
    17  	if(a->ret == NULL && a->n == 0)
    18  		a->ret = malloc(1);
    19  }
    20  
    21  /* Stub for calling free from Go */
    22  void
    23  x_cgo_free(void *p)
    24  {
    25  	struct a {
    26  		void *arg;
    27  	} *a = p;
    28  
    29  	free(a->arg);
    30  }
    31  
    32  /* Stub for creating a new thread */
    33  void
    34  x_cgo_thread_start(ThreadStart *arg)
    35  {
    36  	ThreadStart *ts;
    37  
    38  	/* Make our own copy that can persist after we return. */
    39  	ts = malloc(sizeof *ts);
    40  	if(ts == nil) {
    41  		fprintf(stderr, "runtime/cgo: out of memory in thread_start\n");
    42  		abort();
    43  	}
    44  	*ts = *arg;
    45  
    46  	_cgo_sys_thread_start(ts);	/* OS-dependent half */
    47  }