gcc_darwin_amd64.c

     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 <string.h> /* for strerror */
     6  #include <pthread.h>
     7  #include <signal.h>
     8  #include "libcgo.h"
     9  #include "libcgo_unix.h"
    10  
    11  static void* threadentry(void*);
    12  static void (*setg_gcc)(void*);
    13  
    14  void
    15  x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
    16  {
    17  	setg_gcc = setg;
    18  	_cgo_set_stacklo(g, NULL);
    19  }
    20  
    21  
    22  void
    23  _cgo_sys_thread_start(ThreadStart *ts)
    24  {
    25  	pthread_attr_t attr;
    26  	sigset_t ign, oset;
    27  	pthread_t p;
    28  	size_t size;
    29  	int err;
    30  
    31  	sigfillset(&ign);
    32  	pthread_sigmask(SIG_SETMASK, &ign, &oset);
    33  
    34  	size = pthread_get_stacksize_np(pthread_self());
    35  	pthread_attr_init(&attr);
    36  	pthread_attr_setstacksize(&attr, size);
    37  	// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
    38  	ts->g->stackhi = size;
    39  	err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
    40  
    41  	pthread_sigmask(SIG_SETMASK, &oset, nil);
    42  
    43  	if (err != 0) {
    44  		fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
    45  		abort();
    46  	}
    47  }
    48  
    49  extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
    50  static void*
    51  threadentry(void *v)
    52  {
    53  	ThreadStart ts;
    54  
    55  	ts = *(ThreadStart*)v;
    56  	free(v);
    57  
    58  	crosscall1(ts.fn, setg_gcc, (void*)ts.g);
    59  	return nil;
    60  }
    61
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