Mercurial > hg > nginx-quic
view src/os/unix/ngx_sunpro_atomic_sparc64.h @ 5707:31dd63dcb9ea
Events: use eventfd() instead of syscall(SYS_eventfd) if possible.
This fixes --with-file-aio support on systems that lack eventfd()
syscall, notably aarch64 Linux.
The syscall(SYS_eventfd) may still be necessary on systems that
have eventfd() syscall in the kernel but lack it in glibc, e.g.
as seen in the current CentOS 5 release.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Fri, 23 May 2014 16:37:05 +0400 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #if (NGX_PTR_SIZE == 4) #define NGX_CASA ngx_casa #else #define NGX_CASA ngx_casxa #endif ngx_atomic_uint_t ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock); ngx_atomic_uint_t ngx_casxa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock); /* the code in src/os/unix/ngx_sunpro_sparc64.il */ static ngx_inline ngx_atomic_uint_t ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, ngx_atomic_uint_t set) { set = NGX_CASA(set, old, lock); return (set == old); } static ngx_inline ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) { ngx_atomic_uint_t old, res; old = *value; for ( ;; ) { res = old + add; res = NGX_CASA(res, old, value); if (res == old) { return res; } old = res; } } #define ngx_memory_barrier() \ __asm (".volatile"); \ __asm ("membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad"); \ __asm (".nonvolatile") #define ngx_cpu_pause()