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newlib-cygwin
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2004-01-27 Jeff Johnston <jjohnstn@redhat.com> 

* libc/stdlib/atexit.c: Protect global atexit list with a
        lock when newlib is multithreaded.
This commit is contained in:
Jeff Johnston 2004-01-28 01:00:37 +00:00
parent 01e0a77749
commit d5b6c23483
2 changed files with 27 additions and 2 deletions
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5
newlib/ChangeLog
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@ -1,3 +1,8 @@
2004-01-27 Jeff Johnston <jjohnstn@redhat.com>
* libc/stdlib/atexit.c: Protect global atexit list with a
lock when newlib is multithreaded.
2004-01-27 Artem B. Bityuckiy <abitytsky@softminecorp.com> 2004-01-27 Artem B. Bityuckiy <abitytsky@softminecorp.com>
* configure.in: Add support to generate iconv converter flags * configure.in: Add support to generate iconv converter flags

24
newlib/libc/stdlib/atexit.c
View File

@ -53,6 +53,7 @@ Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
#include <stddef.h> #include <stddef.h>
#include <stdlib.h> #include <stdlib.h>
#include <reent.h> #include <reent.h>
#include <sys/lock.h>
/* /*
* Register a function to be performed at exit. * Register a function to be performed at exit.
@ -65,6 +66,12 @@ _DEFUN (atexit,
{ {
register struct _atexit *p; register struct _atexit *p;
#ifndef __SINGLE_THREAD__
__LOCK_INIT(static, lock);
__lock_acquire(lock);
#endif
/* _REENT_SMALL atexit() doesn't allow more than the required 32 entries. */ /* _REENT_SMALL atexit() doesn't allow more than the required 32 entries. */
#ifndef _REENT_SMALL #ifndef _REENT_SMALL
if ((p = _GLOBAL_REENT->_atexit) == NULL) if ((p = _GLOBAL_REENT->_atexit) == NULL)
@ -72,7 +79,12 @@ _DEFUN (atexit,
if (p->_ind >= _ATEXIT_SIZE) if (p->_ind >= _ATEXIT_SIZE)
{ {
if ((p = (struct _atexit *) malloc (sizeof *p)) == NULL) if ((p = (struct _atexit *) malloc (sizeof *p)) == NULL)
return -1; {
#ifndef __SINGLE_THREAD__
__lock_release(lock);
#endif
return -1;
}
p->_ind = 0; p->_ind = 0;
p->_on_exit_args._fntypes = 0; p->_on_exit_args._fntypes = 0;
p->_next = _GLOBAL_REENT->_atexit; p->_next = _GLOBAL_REENT->_atexit;
@ -81,8 +93,16 @@ _DEFUN (atexit,
#else #else
p = &_GLOBAL_REENT->_atexit; p = &_GLOBAL_REENT->_atexit;
if (p->_ind >= _ATEXIT_SIZE) if (p->_ind >= _ATEXIT_SIZE)
return -1; {
#ifndef __SINGLE_THREAD__
__lock_release(lock);
#endif
return -1;
}
#endif #endif
p->_fns[p->_ind++] = fn; p->_fns[p->_ind++] = fn;
#ifndef __SINGLE_THREAD__
__lock_release(lock);
#endif
return 0; return 0;
} }