gcc_darwin_amd64.c

Documentation: runtime/cgo

     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
    11static void* threadentry(void*);
    12static void (*setg_gcc)(void*);
    13
    14void
    15x_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
    22void
    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
    49extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
    50static void*
    51threadentry(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}
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