Mercurial > hg > nginx
view src/os/win32/ngx_atomic.h @ 9314:32a5186a2705
Win32: improved MinGW/MinGW-w64 GCC checks.
Previously, __GNUC__ was checked, which is now replaced with __MINGW32__
checks. The difference is that __MINGW32__ is defined when using MinGW
(or MinGW-w64) header files regardless of the compiler being used. And,
more importantly, it is not defined when Clang is being used (which
pretends to be GCC by default) with Windows SDK header files.
With this change, it is now possible to compile nginx with native Clang
on Windows. This current requires --with-ld-opt="-lkernel32 -luser32"
though, since native Clang on Windows uses MSVC linker, which does
not link kernel32.lib and user32.lib automatically.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 07 Aug 2024 03:56:59 +0300 |
| parents | 2cd019520210 |
| children |
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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(__MINGW32__) \ || ( _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_ */