mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-22 21:19:58 +08:00
0fcff08299
* gthr-vxworks.h (__ehdtor): Fix memory leak. The delete hook
runs in the context of the deleter, not the deletee, so we must
use taskVarGet to find the correct memory to free.
(__gthread_key_create): Initialize the task
variable subsystem so that the task variable is still active when
the delete hook is run.
From-SVN: r24079
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/* Threads compatibily routines for libgcc2 for VxWorks. */
|
|
/* Compile this one with gcc. */
|
|
/* Copyright (C) 1997 Free Software Foundation, Inc.
|
|
Contributed by Mike Stump <mrs@wrs.com>.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU CC is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU CC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* As a special exception, if you link this library with other files,
|
|
some of which are compiled with GCC, to produce an executable,
|
|
this library does not by itself cause the resulting executable
|
|
to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why
|
|
the executable file might be covered by the GNU General Public License. */
|
|
|
|
#ifndef __gthr_vxworks_h
|
|
#define __gthr_vxworks_h
|
|
|
|
/* POSIX threads specific definitions.
|
|
Easy, since the interface is just one-to-one mapping. */
|
|
|
|
#define __GTHREADS 1
|
|
|
|
#include <vxWorks.h>
|
|
#include <semLib.h>
|
|
/* typedef void *SEM_ID; */
|
|
|
|
typedef int __gthread_key_t;
|
|
typedef char __gthread_once_t;
|
|
typedef SEM_ID __gthread_mutex_t;
|
|
|
|
#define __GTHREAD_MUTEX_INIT 0
|
|
#define __GTHREAD_ONCE_INIT 0
|
|
|
|
#ifndef REG_SAVED_REG
|
|
static inline int
|
|
__gthread_once (__gthread_once_t *once, void (*func) ())
|
|
{
|
|
(*func)();
|
|
return 0;
|
|
}
|
|
|
|
extern __gthread_key_t eh_context_key;
|
|
|
|
/* This is not the right way to do it, but the semantic of pthreads
|
|
don't map well enough onto VxWorks. */
|
|
|
|
static void
|
|
__ehdtor (void *pTcb)
|
|
{
|
|
int tid = (int) pTcb;
|
|
void *p = (void*)taskVarGet(tid, &eh_context_key);
|
|
if (p != (void*)-1)
|
|
{
|
|
if (p)
|
|
free (p);
|
|
taskVarSet(tid, &eh_context_key, 0);
|
|
}
|
|
}
|
|
|
|
/* This only works for the code in libgcc2.c. */
|
|
|
|
static inline int
|
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
|
{
|
|
*key = 0;
|
|
|
|
/* Do this first so that the task variables are visible during the
|
|
running of the delete hook. */
|
|
|
|
taskVarInit();
|
|
|
|
/* We don't have a way to track dtor here, so instead, we
|
|
register a generic routine that can cleanup any task. */
|
|
|
|
taskDeleteHookAdd (__ehdtor);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define __gthread_setspecific(key, ptr) \
|
|
(key = (int) ptr, 0)
|
|
|
|
static inline int
|
|
__gthread_key_dtor (__gthread_key_t key, void *ptr)
|
|
{
|
|
/* Just reset the key value to zero. */
|
|
if (ptr)
|
|
return __gthread_setspecific (key, 0);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
#define __gthread_key_delete(key) \
|
|
taskVarDelete (taskIdSelf (), &key)
|
|
|
|
#define __gthread_getspecific(key) \
|
|
((key == 0) \
|
|
? ((taskVarAdd (taskIdSelf (), &key) != OK) \
|
|
? (__terminate (), (void*)0) \
|
|
: (void*)0) \
|
|
: (void*)key)
|
|
#endif
|
|
|
|
static inline int
|
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
|
{
|
|
if (*mutex == 0)
|
|
*mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);
|
|
return semTake (*mutex, WAIT_FOREVER);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
|
{
|
|
if (*mutex == 0)
|
|
*mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);
|
|
return semTake (*mutex, NO_WAIT);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
|
{
|
|
/* We could return the */
|
|
return semGive (*mutex);
|
|
}
|
|
|
|
#endif /* not __gthr_vxworks_h */
|