pthread_cond_signal implementation for Linux/x86-64.

diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S
new file mode 100644 (file)
index 0000000..6c28bc4
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S
@@ -0,0 +1,109 @@
+/* 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.
+
+   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 <sysdep.h>
+#include <shlib-compat.h>
+#include <lowlevelcond.h>
+
+#ifdef UP
+# define LOCK
+#else
+# define LOCK lock
+#endif
+
+#define SYS_futex              202
+#define FUTEX_WAIT             0
+#define FUTEX_WAKE             1
+
+
+       .text
+
+       /* int pthread_cond_broadcast (pthread_cond_t *cond) */
+       .globl  __pthread_cond_broadcast
+       .type   __pthread_cond_broadcast, @function
+       .align  16
+__pthread_cond_broadcast:
+
+       /* Get internal lock.  */
+       movl    $1, %esi
+       LOCK
+#if cond_lock == 0
+       xaddl   %esi, (%rdi)
+#else
+       xaddl   %esi, cond_lock(%rdi)
+#endif
+       testl   %esi, %esi
+       jne     1f
+
+2:     addq    $wakeup_seq, %rdi
+       movq    total_seq-wakeup_seq(%rdi), %rcx
+       cmpq    (%rdi), %rcx
+       jna     4f
+
+       /* Cause all currently waiting threads to recognize they are
+          woken up.  */
+       movq    %rcx, (%rdi)
+
+       /* Unlock.  */
+       LOCK
+       decl    cond_lock-wakeup_seq(%rdi)
+       jne     7f
+
+       /* Wake up all threads.  */
+8:     movq    $FUTEX_WAKE, %rsi
+       movq    $SYS_futex, %rax
+       movl    $0x7fffffff, %edx
+       syscall
+
+       xorl    %eax, %eax
+       retq
+
+       .align  16
+       /* Unlock.  */
+4:     LOCK
+       decl    cond_lock-wakeup_seq(%rdi)
+       jne     5f
+
+6:     xorl    %eax, %eax
+       retq
+
+       /* Initial locking failed.  */
+1:
+#if cond_lock != 0
+       addq    $cond_lock, %rdi
+#endif
+       call    __lll_mutex_lock_wait
+#if cond_lock != 0
+       subq    $cond_lock, %rdi
+#endif
+       jmp     2b
+
+       /* Unlock in loop requires waekup.  */
+5:     addq    $cond_lock-wakeup_seq, %rdi
+       call    __lll_mutex_unlock_wake
+       jmp     6b
+
+       /* Unlock in loop requires waekup.  */
+7:     addq    $cond_lock-wakeup_seq, %rdi
+       call    __lll_mutex_unlock_wake
+       subq    $cond_lock-wakeup_seq, %rdi
+       jmp     8b
+       .size   __pthread_cond_broadcast, .-__pthread_cond_broadcast
+versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,
+                 GLIBC_2_3_2)

diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
new file mode 100644 (file)
index 0000000..0d3249a
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
@@ -0,0 +1,93 @@
+/* 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.
+
+   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 <sysdep.h>
+#include <shlib-compat.h>
+#include <lowlevelcond.h>
+
+#ifdef UP
+# define LOCK
+#else
+# define LOCK lock
+#endif
+
+#define SYS_futex              202
+#define FUTEX_WAIT             0
+#define FUTEX_WAKE             1
+
+
+       .text
+
+       /* int pthread_cond_signal (pthread_cond_t *cond) */
+       .globl  __pthread_cond_signal
+       .type   __pthread_cond_signal, @function
+       .align  16
+__pthread_cond_signal:
+
+       /* Get internal lock.  */
+       movl    $1, %esi
+       LOCK
+#if cond_lock == 0
+       xaddl   %esi, (%rdi)
+#else
+       xaddl   %esi, cond_lock(%rdi)
+#endif
+       testl   %esi, %esi
+       jne     1f
+
+2:     addq    $wakeup_seq, %rdi
+       movq    total_seq-wakeup_seq(%rdi), %rcx
+       cmpq    (%rdi), %rcx
+       jbe     4f
+
+       /* Bump the wakeup number.  */
+       addq    $1, (%rdi)
+
+       /* Wake up one thread.  */
+       movq    $FUTEX_WAKE, %rsi
+       movq    $SYS_futex, %rax
+       movq    %rsi, %edx      /* movl $1, %edx */
+       syscall
+
+       /* Unlock.  */
+4:     LOCK
+       decl    cond_lock-wakeup_seq(%rdi)
+       jne     5f
+
+6:     xorl    %eax, %eax
+       retq
+
+       /* Initial locking failed.  */
+1:
+#if cond_lock != 0
+       addq    $cond_lock, %rdi
+#endif
+       call    __lll_mutex_lock_wait
+#if cond_lock != 0
+       subq    $cond_lock, %rdi
+#endif
+       jmp     2b
+
+       /* Unlock in loop requires waekup.  */
+5:      addq   $cond_lock-wakeup_seq, %rdi
+       call    __lll_mutex_unlock_wake
+       jmp     6b
+       .size   __pthread_cond_signal, .-__pthread_cond_signal
+versioned_symbol (libpthread, __pthread_cond_signal, pthread_cond_signal,
+                 GLIBC_2_3_2)