Initial commit

2018-02-14 15:05:29 +09:00
commit 20f797d2f6
8093 changed files with 1360150 additions and 0 deletions
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+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#ifndef _NGX_ATOMIC_H_INCLUDED_
+#define _NGX_ATOMIC_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#define NGX_HAVE_ATOMIC_OPS   1
+
+typedef int32_t                     ngx_atomic_int_t;
+typedef uint32_t                    ngx_atomic_uint_t;
+typedef volatile ngx_atomic_uint_t  ngx_atomic_t;
+#define NGX_ATOMIC_T_LEN            (sizeof("-2147483648") - 1)
+
+
+#if defined( __WATCOMC__ ) || defined( __BORLANDC__ ) || defined(__GNUC__)    \
+    || ( _MSC_VER >= 1300 )
+
+/* the new SDK headers */
+
+#define ngx_atomic_cmp_set(lock, old, set)                                    \
+    ((ngx_atomic_uint_t) InterlockedCompareExchange((long *) lock, set, old)  \
+                         == old)
+
+#else
+
+/* the old MS VC6.0SP2 SDK headers */
+
+#define ngx_atomic_cmp_set(lock, old, set)                                    \
+    (InterlockedCompareExchange((void **) lock, (void *) set, (void *) old)   \
+     == (void *) old)
+
+#endif
+
+
+#define ngx_atomic_fetch_add(p, add) InterlockedExchangeAdd((long *) p, add)
+
+
+#define ngx_memory_barrier()
+
+
+#if defined( __BORLANDC__ ) || ( __WATCOMC__ < 1230 )
+
+/*
+ * Borland C++ 5.5 (tasm32) and Open Watcom C prior to 1.3
+ * do not understand the "pause" instruction
+ */
+
+#define ngx_cpu_pause()
+#else
+#define ngx_cpu_pause()       __asm { pause }
+#endif
+
+
+void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);
+
+#define ngx_trylock(lock)  (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))
+#define ngx_unlock(lock)    *(lock) = 0
+
+
+#endif /* _NGX_ATOMIC_H_INCLUDED_ */