diff options
author | Igor Sysoev <igor@sysoev.ru> | 2005-10-12 17:50:36 +0400 |
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committer | Igor Sysoev <igor@sysoev.ru> | 2005-10-12 17:50:36 +0400 |
commit | 784522377ec160bc148ff3bb40fb87ede7506d5d (patch) | |
tree | 0c76a9c51a1c2ffa35ad3eb05e3b80f6cc19c60a /src/os/unix/ngx_gcc_atomic_sparc64.h | |
parent | bbfe3033bc82427b15ccf73767e786cbb12a7627 (diff) |
nginx-0.3.2-RELEASE importrelease-0.3.2
*) Feature: the Sun Studio 10 C compiler support.
*) Feature: the "proxy_upstream_max_fails",
"proxy_upstream_fail_timeout", "fastcgi_upstream_max_fails", and
"fastcgi_upstream_fail_timeout" directives.
Diffstat (limited to 'src/os/unix/ngx_gcc_atomic_sparc64.h')
-rw-r--r-- | src/os/unix/ngx_gcc_atomic_sparc64.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/os/unix/ngx_gcc_atomic_sparc64.h b/src/os/unix/ngx_gcc_atomic_sparc64.h new file mode 100644 index 000000000..c7022a930 --- /dev/null +++ b/src/os/unix/ngx_gcc_atomic_sparc64.h @@ -0,0 +1,69 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +/* + * "casa [r1] 0x80, r2, r0" and + * "casxa [r1] 0x80, r2, r0" do the following: + * + * if ([r1] == r2) { + * swap(r0, [r1]); + * } else { + * r0 = [r1]; + * } + * + * so "r0 == r2" means that the operation was successfull. + * + * + * The "r" means the general register. + * The "+r" means the general register used for both input and output. + */ + + +#if (NGX_PTR_SIZE == 4) +#define NGX_CASA "casa" +#else +#define NGX_CASA "casxa" +#endif + + +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) +{ + __asm__ volatile ( + + NGX_CASA " [%1] 0x80, %2, %0" + + : "+r" (set) : "r" (lock), "r" (old) : "memory"); + + 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; + + __asm__ volatile ( + + NGX_CASA " [%1] 0x80, %2, %0" + + : "+r" (res) : "r" (value), "r" (old) : "memory"); + + if (res == old) { + return res; + } + + old = res; + } +} |