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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

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This commit is contained in:
Ulrich Drepper
2004-12-22 20:10:10 +00:00
parent 0ecb606cb6
commit a334319f65
6215 changed files with 304673 additions and 494300 deletions
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47
nptl/pthread_key_create.c
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@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2006 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -19,36 +19,45 @@
#include <errno.h>
#include "pthreadP.h"
#include <atomic.h>
/* Internal mutex for __pthread_keys table handling. */
lll_lock_t __pthread_keys_lock = LLL_LOCK_INITIALIZER;
int
__pthread_key_create (key, destr)
pthread_key_t *key;
void (*destr) (void *);
{
int result = EAGAIN;
size_t cnt;
lll_lock (__pthread_keys_lock);
/* Find a slot in __pthread_kyes which is unused. */
for (size_t cnt = 0; cnt < PTHREAD_KEYS_MAX; ++cnt)
{
uintptr_t seq = __pthread_keys[cnt].seq;
for (cnt = 0; cnt < PTHREAD_KEYS_MAX; ++cnt)
if (KEY_UNUSED (__pthread_keys[cnt].seq)
&& KEY_USABLE (__pthread_keys[cnt].seq))
{
/* We found an unused slot. */
++__pthread_keys[cnt].seq;
if (KEY_UNUSED (seq) && KEY_USABLE (seq)
/* We found an unused slot. Try to allocate it. */
&& ! atomic_compare_and_exchange_bool_acq (&__pthread_keys[cnt].seq,
seq + 1, seq))
{
/* Remember the destructor. */
__pthread_keys[cnt].destr = destr;
/* Remember the destructor. */
__pthread_keys[cnt].destr = destr;
/* Return the key to the caller. */
*key = cnt;
/* Return the key to the caller. */
*key = cnt;
/* The call succeeded. */
return 0;
}
}
/* The call succeeded. */
result = 0;
return EAGAIN;
/* We found a key and can stop now. */
break;
}
lll_unlock (__pthread_keys_lock);
return result;
}
strong_alias (__pthread_key_create, pthread_key_create)
strong_alias (__pthread_key_create, __pthread_key_create_internal)