New PHP5 APC - version 3.0.18, using PHP5 5.2.0-8+etch10,

[php5-apc.git] / arch / x86_64 / atomic.h

diff --git a/arch/x86_64/atomic.h b/arch/x86_64/atomic.h
new file mode 100644 (file)
index 0000000..4b882d5
--- /dev/null
+++ b/arch/x86_64/atomic.h
@@ -0,0 +1,80 @@
+/*
+  +----------------------------------------------------------------------+
+  | APC                                                                  |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 2006 The PHP Group                                     |
+  +----------------------------------------------------------------------+
+  | This source file is subject to version 3.01 of the PHP license,      |
+  | that is bundled with this package in the file LICENSE, and is        |
+  | available through the world-wide-web at the following url:           |
+  | http://www.php.net/license/3_01.txt                                  |
+  | If you did not receive a copy of the PHP license and are unable to   |
+  | obtain it through the world-wide-web, please send a note to          |
+  | license@php.net so we can mail you a copy immediately.               |
+  +----------------------------------------------------------------------+
+  | Authors: Brian Shire <shire@php.net>                                 |
+  +----------------------------------------------------------------------+
+
+ */
+
+/* $Id: atomic.h,v 1.1 2006/09/29 07:13:01 shire Exp $ */
+
+
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include <linux/futex.h>
+
+/* int sys_futex (void *futex, int op, int val, const struct timespec *timeout); */
+static inline long int apc_sys_futex(void *futex, int op, int val, const struct timespec *timeout) {
+
+  long int ret;
+
+  /* x86_64 system calls are performed with the faster SYSCALL operation.
+   *  the argument order is D, S, d, c, b, a rather than
+   *  a, b, c, d, S, D as on the i386 int 80h call. 
+  */ 
+  asm volatile ("syscall" 
+       : "=a" (ret)
+       : "0" (SYS_futex), 
+         "D" (futex), 
+         "S" (op), 
+         "d" (val),
+         "c" (timeout)
+       : "r11", "rcx", "memory"
+      );
+
+  return ret;
+
+} 
+
+
+static inline int apc_cmpxchg(volatile int *ptr, int old, int new) {
+
+    int prev;
+
+    asm volatile ("LOCK cmpxchgl %1, %2"
+                   : "=a" (prev)
+                   : "r" (new), 
+                     "m" (*(ptr)), 
+                     "0"(old)
+                   : "memory", "cc"
+                 );
+
+    return prev;
+}
+
+static inline int apc_xchg(volatile int *ptr, int new) {
+
+    int ret;
+  
+    asm volatile ("LOCK xchgl %[new], %[ptr]"
+                  : "=a" (ret)
+                  : [new] "0" (new), 
+                    [ptr] "m" (*(ptr))
+                  : "memory"
+                 );
+
+    return ret;
+    
+}
+