github.com/aloncn/graphics-go@v0.0.1/src/runtime/cgo/gcc_linux_ppc64x.c (about)

     1  // Copyright 2014 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  // +build cgo
     6  
     7  // +build ppc64 ppc64le
     8  
     9  #include <pthread.h>
    10  #include <string.h>
    11  #include <signal.h>
    12  #include "libcgo.h"
    13  
    14  static void *threadentry(void*);
    15  
    16  void (*x_cgo_inittls)(void **tlsg, void **tlsbase);
    17  static void (*setg_gcc)(void*);
    18  
    19  void
    20  x_cgo_init(G *g, void (*setg)(void*), void **tlsbase)
    21  {
    22  	pthread_attr_t attr;
    23  	size_t size;
    24  
    25  	setg_gcc = setg;
    26  	pthread_attr_init(&attr);
    27  	pthread_attr_getstacksize(&attr, &size);
    28  	g->stacklo = (uintptr)&attr - size + 4096;
    29  	pthread_attr_destroy(&attr);
    30  }
    31  
    32  void
    33  _cgo_sys_thread_start(ThreadStart *ts)
    34  {
    35  	pthread_attr_t attr;
    36  	sigset_t ign, oset;
    37  	pthread_t p;
    38  	size_t size;
    39  	int err;
    40  
    41  	sigfillset(&ign);
    42  	pthread_sigmask(SIG_SETMASK, &ign, &oset);
    43  
    44  	pthread_attr_init(&attr);
    45  	pthread_attr_getstacksize(&attr, &size);
    46  	// Leave stacklo=0 and set stackhi=size; mstack will do the rest.
    47  	ts->g->stackhi = size;
    48  	err = pthread_create(&p, &attr, threadentry, ts);
    49  
    50  	pthread_sigmask(SIG_SETMASK, &oset, nil);
    51  
    52  	if (err != 0) {
    53  		fatalf("pthread_create failed: %s", strerror(err));
    54  	}
    55  }
    56  
    57  extern void crosscall_ppc64(void (*fn)(void), void *g);
    58  
    59  static void*
    60  threadentry(void *v)
    61  {
    62  	ThreadStart ts;
    63  
    64  	ts = *(ThreadStart*)v;
    65  	free(v);
    66  
    67  	// Save g for this thread in C TLS
    68  	setg_gcc((void*)ts.g);
    69  
    70  	crosscall_ppc64(ts.fn, (void*)ts.g);
    71  	return nil;
    72  }