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diff src/os/unix/ngx_atomic.h @ 554:5c576ea5dbd9 NGINX_0_8_29

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nginx 0.8.29 *) Change: now the "009" status code is written to an access log for proxied HTTP/0.9 responses. *) Feature: the "addition_types", "charset_types", "gzip_types", "ssi_types", "sub_filter_types", and "xslt_types" directives support an "*" parameter. *) Feature: GCC 4.1+ built-in atomic operations usage. Thanks to W-Mark Kubacki. *) Feature: the --with-libatomic[=DIR] option in the configure. Thanks to W-Mark Kubacki. *) Bugfix: listen unix domain socket had limited access rights. *) Bugfix: cached HTTP/0.9 responses were handled incorrectly. *) Bugfix: regular expression named captures given by "?P<...>" did not work in a "server_name" directive. Thanks to Maxim Dounin.
author Igor Sysoev <http://sysoev.ru>
date Mon, 30 Nov 2009 00:00:00 +0300
parents 4c5d2c627a6c
children 25255878df91
line wrap: on
line diff
--- a/src/os/unix/ngx_atomic.h
+++ b/src/os/unix/ngx_atomic.h
@@ -12,7 +12,31 @@
 #include <ngx_core.h>
 
 
-#if (NGX_DARWIN_ATOMIC)
+#if (NGX_HAVE_LIBATOMIC)
+
+#include <atomic_ops.h>
+
+#define NGX_HAVE_ATOMIC_OPS  1
+
+typedef long                        ngx_atomic_int_t;
+typedef AO_t                        ngx_atomic_uint_t;
+typedef volatile ngx_atomic_uint_t  ngx_atomic_t;
+
+#if (NGX_PTR_SIZE == 8)
+#define NGX_ATOMIC_T_LEN            (sizeof("-9223372036854775808") - 1)
+#else
+#define NGX_ATOMIC_T_LEN            (sizeof("-2147483648") - 1)
+#endif
+
+#define ngx_atomic_cmp_set(lock, old, new)                                    \
+    AO_compare_and_swap(lock, old, new)
+#define ngx_atomic_fetch_add(value, add)                                      \
+    AO_fetch_and_add(value, add)
+#define ngx_memory_barrier()        AO_nop()
+#define ngx_cpu_pause()
+
+
+#elif (NGX_DARWIN_ATOMIC)
 
 /*
  * use Darwin 8 atomic(3) and barrier(3) operations
@@ -60,10 +84,40 @@ typedef uint32_t                    ngx_
 typedef volatile ngx_atomic_uint_t  ngx_atomic_t;
 
 
-#else /* !(NGX_DARWIN) */
+#elif (NGX_HAVE_GCC_ATOMIC)
+
+/* GCC 4.1 builtin atomic operations */
+
+#define NGX_HAVE_ATOMIC_OPS  1
+
+typedef long                        ngx_atomic_int_t;
+typedef unsigned long               ngx_atomic_uint_t;
+
+#if (NGX_PTR_SIZE == 8)
+#define NGX_ATOMIC_T_LEN            (sizeof("-9223372036854775808") - 1)
+#else
+#define NGX_ATOMIC_T_LEN            (sizeof("-2147483648") - 1)
+#endif
+
+typedef volatile ngx_atomic_uint_t  ngx_atomic_t;
 
 
-#if ( __i386__ || __i386 )
+#define ngx_atomic_cmp_set(lock, old, set)                                    \
+    __sync_bool_compare_and_swap(lock, old, set)
+
+#define ngx_atomic_fetch_add(value, add)                                      \
+    __sync_fetch_and_add(value, add)
+
+#define ngx_memory_barrier()        __sync_synchronize()
+
+#if ( __i386__ || __i386 || __amd64__ || __amd64 )
+#define ngx_cpu_pause()             __asm__ ("pause")
+#else
+#define ngx_cpu_pause()
+#endif
+
+
+#elif ( __i386__ || __i386 )
 
 typedef int32_t                     ngx_atomic_int_t;
 typedef uint32_t                    ngx_atomic_uint_t;
@@ -203,9 +257,6 @@ typedef volatile ngx_atomic_uint_t  ngx_
 
 #include "ngx_gcc_atomic_ppc.h"
 
-
-#endif
-
 #endif