github.com/ice-blockchain/go/src@v0.0.0-20240403114104-1564d284e521/runtime/cgo/gcc_dragonfly_amd64.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 <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  	setg_gcc = setg;
    20  	_cgo_set_stacklo(g, NULL);
    21  }
    22  
    23  void
    24  _cgo_sys_thread_start(ThreadStart *ts)
    25  {
    26  	pthread_attr_t attr;
    27  	sigset_t ign, oset;
    28  	pthread_t p;
    29  	size_t size;
    30  	int err;
    31  
    32  	SIGFILLSET(ign);
    33  	pthread_sigmask(SIG_SETMASK, &ign, &oset);
    34  
    35  	pthread_attr_init(&attr);
    36  	pthread_attr_getstacksize(&attr, &size);
    37  
    38  	// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
    39  	ts->g->stackhi = size;
    40  	err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
    41  
    42  	pthread_sigmask(SIG_SETMASK, &oset, nil);
    43  
    44  	if (err != 0) {
    45  		fatalf("pthread_create failed: %s", strerror(err));
    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  }