zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libpthread/nptl/pthread_mutex_unlock.c b/ap/build/uClibc/libpthread/nptl/pthread_mutex_unlock.c
new file mode 100644
index 0000000..3abada2
--- /dev/null
+++ b/ap/build/uClibc/libpthread/nptl/pthread_mutex_unlock.c
@@ -0,0 +1,294 @@
+/* Copyright (C) 2002, 2003, 2005-2008, 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include "pthreadP.h"
+#include <lowlevellock.h>
+
+static int
+internal_function
+__pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
+ __attribute_noinline__;
+
+int
+internal_function attribute_hidden
+__pthread_mutex_unlock_usercnt (
+ pthread_mutex_t *mutex,
+ int decr)
+{
+ int type = PTHREAD_MUTEX_TYPE (mutex);
+ if (__builtin_expect (type & ~PTHREAD_MUTEX_KIND_MASK_NP, 0))
+ return __pthread_mutex_unlock_full (mutex, decr);
+
+ if (__builtin_expect (type, PTHREAD_MUTEX_TIMED_NP)
+ == PTHREAD_MUTEX_TIMED_NP)
+ {
+ /* Always reset the owner field. */
+ normal:
+ mutex->__data.__owner = 0;
+ if (decr)
+ /* One less user. */
+ --mutex->__data.__nusers;
+
+ /* Unlock. */
+ lll_unlock (mutex->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex));
+ return 0;
+ }
+ else if (__builtin_expect (type == PTHREAD_MUTEX_RECURSIVE_NP, 1))
+ {
+ /* Recursive mutex. */
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+ return EPERM;
+
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return 0;
+ goto normal;
+ }
+ else if (__builtin_expect (type == PTHREAD_MUTEX_ADAPTIVE_NP, 1))
+ goto normal;
+ else
+ {
+ /* Error checking mutex. */
+ assert (type == PTHREAD_MUTEX_ERRORCHECK_NP);
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
+ || ! lll_islocked (mutex->__data.__lock))
+ return EPERM;
+ goto normal;
+ }
+}
+
+
+static int
+internal_function
+__pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
+{
+ int newowner = 0;
+
+ switch (PTHREAD_MUTEX_TYPE (mutex))
+ {
+ case PTHREAD_MUTEX_ROBUST_RECURSIVE_NP:
+ /* Recursive mutex. */
+ if ((mutex->__data.__lock & FUTEX_TID_MASK)
+ == THREAD_GETMEM (THREAD_SELF, tid)
+ && __builtin_expect (mutex->__data.__owner
+ == PTHREAD_MUTEX_INCONSISTENT, 0))
+ {
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return ENOTRECOVERABLE;
+
+ goto notrecoverable;
+ }
+
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+ return EPERM;
+
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return 0;
+
+ goto robust;
+
+ case PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP:
+ case PTHREAD_MUTEX_ROBUST_NORMAL_NP:
+ case PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP:
+ if ((mutex->__data.__lock & FUTEX_TID_MASK)
+ != THREAD_GETMEM (THREAD_SELF, tid)
+ || ! lll_islocked (mutex->__data.__lock))
+ return EPERM;
+
+ /* If the previous owner died and the caller did not succeed in
+ making the state consistent, mark the mutex as unrecoverable
+ and make all waiters. */
+ if (__builtin_expect (mutex->__data.__owner
+ == PTHREAD_MUTEX_INCONSISTENT, 0))
+ notrecoverable:
+ newowner = PTHREAD_MUTEX_NOTRECOVERABLE;
+
+ robust:
+ /* Remove mutex from the list. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+ &mutex->__data.__list.__next);
+ DEQUEUE_MUTEX (mutex);
+
+ mutex->__data.__owner = newowner;
+ if (decr)
+ /* One less user. */
+ --mutex->__data.__nusers;
+
+ /* Unlock. */
+ lll_robust_unlock (mutex->__data.__lock,
+ PTHREAD_ROBUST_MUTEX_PSHARED (mutex));
+
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+ break;
+
+ case PTHREAD_MUTEX_PI_RECURSIVE_NP:
+ /* Recursive mutex. */
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+ return EPERM;
+
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return 0;
+ goto continue_pi_non_robust;
+
+ case PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP:
+ /* Recursive mutex. */
+ if ((mutex->__data.__lock & FUTEX_TID_MASK)
+ == THREAD_GETMEM (THREAD_SELF, tid)
+ && __builtin_expect (mutex->__data.__owner
+ == PTHREAD_MUTEX_INCONSISTENT, 0))
+ {
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return ENOTRECOVERABLE;
+
+ goto pi_notrecoverable;
+ }
+
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+ return EPERM;
+
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return 0;
+
+ goto continue_pi_robust;
+
+ case PTHREAD_MUTEX_PI_ERRORCHECK_NP:
+ case PTHREAD_MUTEX_PI_NORMAL_NP:
+ case PTHREAD_MUTEX_PI_ADAPTIVE_NP:
+ case PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP:
+ case PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP:
+ case PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP:
+ if ((mutex->__data.__lock & FUTEX_TID_MASK)
+ != THREAD_GETMEM (THREAD_SELF, tid)
+ || ! lll_islocked (mutex->__data.__lock))
+ return EPERM;
+
+ /* If the previous owner died and the caller did not succeed in
+ making the state consistent, mark the mutex as unrecoverable
+ and make all waiters. */
+ if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0
+ && __builtin_expect (mutex->__data.__owner
+ == PTHREAD_MUTEX_INCONSISTENT, 0))
+ pi_notrecoverable:
+ newowner = PTHREAD_MUTEX_NOTRECOVERABLE;
+
+ if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0)
+ {
+ continue_pi_robust:
+ /* Remove mutex from the list.
+ Note: robust PI futexes are signaled by setting bit 0. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+ (void *) (((uintptr_t) &mutex->__data.__list.__next)
+ | 1));
+ DEQUEUE_MUTEX (mutex);
+ }
+
+ continue_pi_non_robust:
+ mutex->__data.__owner = newowner;
+ if (decr)
+ /* One less user. */
+ --mutex->__data.__nusers;
+
+ /* Unlock. */
+ if ((mutex->__data.__lock & FUTEX_WAITERS) != 0
+ || atomic_compare_and_exchange_bool_rel (&mutex->__data.__lock, 0,
+ THREAD_GETMEM (THREAD_SELF,
+ tid)))
+ {
+ int robust = mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP;
+ int private = (robust
+ ? PTHREAD_ROBUST_MUTEX_PSHARED (mutex)
+ : PTHREAD_MUTEX_PSHARED (mutex));
+ INTERNAL_SYSCALL_DECL (__err);
+ INTERNAL_SYSCALL (futex, __err, 2, &mutex->__data.__lock,
+ __lll_private_flag (FUTEX_UNLOCK_PI, private));
+ }
+
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+ break;
+
+ case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+ /* Recursive mutex. */
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+ return EPERM;
+
+ if (--mutex->__data.__count != 0)
+ /* We still hold the mutex. */
+ return 0;
+ goto pp;
+
+ case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+ /* Error checking mutex. */
+ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
+ || (mutex->__data.__lock & ~ PTHREAD_MUTEX_PRIO_CEILING_MASK) == 0)
+ return EPERM;
+ /* FALLTHROUGH */
+
+ case PTHREAD_MUTEX_PP_NORMAL_NP:
+ case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+ /* Always reset the owner field. */
+ pp:
+ mutex->__data.__owner = 0;
+
+ if (decr)
+ /* One less user. */
+ --mutex->__data.__nusers;
+
+ /* Unlock. */
+ int newval, oldval;
+ do
+ {
+ oldval = mutex->__data.__lock;
+ newval = oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK;
+ }
+ while (atomic_compare_and_exchange_bool_rel (&mutex->__data.__lock,
+ newval, oldval));
+
+ if ((oldval & ~PTHREAD_MUTEX_PRIO_CEILING_MASK) > 1)
+ lll_futex_wake (&mutex->__data.__lock, 1,
+ PTHREAD_MUTEX_PSHARED (mutex));
+
+ int oldprio = newval >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+ return __pthread_tpp_change_priority (oldprio, -1);
+
+ default:
+ /* Correct code cannot set any other type. */
+ return EINVAL;
+ }
+
+ return 0;
+}
+
+
+int
+attribute_protected
+__pthread_mutex_unlock (
+ pthread_mutex_t *mutex)
+{
+ return __pthread_mutex_unlock_usercnt (mutex, 1);
+}
+strong_alias (__pthread_mutex_unlock, pthread_mutex_unlock)
+strong_alias (__pthread_mutex_unlock, __pthread_mutex_unlock_internal)