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Text file src/runtime/cgo/gcc_freebsd_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 <sys/types.h>
     6	#include <sys/signalvar.h>
     7	#include <pthread.h>
     8	#include <signal.h>
     9	#include <string.h>
    10	#include "libcgo.h"
    11	#include "libcgo_unix.h"
    12	
    13	static void* threadentry(void*);
    14	static void (*setg_gcc)(void*);
    15	
    16	void
    17	x_cgo_init(G *g, void (*setg)(void*))
    18	{
    19		pthread_attr_t attr;
    20		size_t size;
    21	
    22		setg_gcc = setg;
    23		pthread_attr_init(&attr);
    24		pthread_attr_getstacksize(&attr, &size);
    25		g->stacklo = (uintptr)&attr - size + 4096;
    26		pthread_attr_destroy(&attr);
    27	}
    28	
    29	void
    30	_cgo_sys_thread_start(ThreadStart *ts)
    31	{
    32		pthread_attr_t attr;
    33		sigset_t ign, oset;
    34		pthread_t p;
    35		size_t size;
    36		int err;
    37	
    38		SIGFILLSET(ign);
    39		pthread_sigmask(SIG_SETMASK, &ign, &oset);
    40	
    41		pthread_attr_init(&attr);
    42		pthread_attr_getstacksize(&attr, &size);
    43	
    44		// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
    45		ts->g->stackhi = size;
    46		err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
    47	
    48		pthread_sigmask(SIG_SETMASK, &oset, nil);
    49	
    50		if (err != 0) {
    51			fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
    52			abort();
    53		}
    54	}
    55	
    56	static void*
    57	threadentry(void *v)
    58	{
    59		ThreadStart ts;
    60	
    61		ts = *(ThreadStart*)v;
    62		free(v);
    63	
    64		/*
    65		 * Set specific keys.
    66		 */
    67		setg_gcc((void*)ts.g);
    68	
    69		crosscall_amd64(ts.fn);
    70		return nil;
    71	}

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