Mercurial > hg > nginx
annotate src/os/unix/ngx_gcc_atomic_amd64.h @ 563:9c2f3ed7a247 release-0.3.3
nginx-0.3.3-RELEASE import
*) Change: the "bl" and "af" parameters of the "listen" directive was
renamed to the "backlog" and "accept_filter".
*) Feature: the "rcvbuf" and "sndbuf" parameters of the "listen"
directive.
*) Change: the "$msec" log parameter does not require now the
additional the gettimeofday() system call.
*) Feature: the -t switch now tests the "listen" directives.
*) Bugfix: if the invalid address was specified in the "listen"
directive, then after the -HUP signal nginx left an open socket in
the CLOSED state.
*) Bugfix: the mime type may be incorrectly set to default value for
index file with variable in the name; the bug had appeared in 0.3.0.
*) Feature: the "timer_resolution" directive.
*) Feature: the millisecond "$upstream_response_time" log parameter.
*) Bugfix: a temporary file with client request body now is removed
just after the response header was transferred to a client.
*) Bugfix: OpenSSL 0.9.6 compatibility.
*) Bugfix: the SSL certificate and key file paths could not be relative.
*) Bugfix: the "ssl_prefer_server_ciphers" directive did not work in
the ngx_imap_ssl_module.
*) Bugfix: the "ssl_protocols" directive allowed to specify the single
protocol only.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 19 Oct 2005 12:33:58 +0000 |
| parents | e48ebafc6939 |
| children | 4d9ea73a627a |
| rev | line source |
|---|---|
| 561 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #if (NGX_SMP) | |
| 8 #define NGX_SMP_LOCK "lock;" | |
| 9 #else | |
| 10 #define NGX_SMP_LOCK | |
| 11 #endif | |
| 12 | |
| 13 | |
| 14 /* | |
| 15 * "cmpxchgq r, [m]": | |
| 16 * | |
| 17 * if (rax == [m]) { | |
| 18 * zf = 1; | |
| 19 * [m] = r; | |
| 20 * } else { | |
| 21 * zf = 0; | |
| 22 * rax = [m]; | |
| 23 * } | |
| 24 * | |
| 25 * | |
| 26 * The "r" is any register, %rax (%r0) - %r16. | |
| 27 * The "=a" and "a" are the %rax register. Although we can return result | |
| 28 * in any register, we use %rax because it is used in cmpxchgq anyway. | |
| 29 * The "cc" means that flags were changed. | |
| 30 */ | |
| 31 | |
| 32 static ngx_inline ngx_atomic_uint_t | |
| 33 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
| 34 ngx_atomic_uint_t set) | |
| 35 { | |
| 36 ngx_atomic_uint_t res; | |
| 37 | |
| 38 __asm__ volatile ( | |
| 39 | |
| 40 NGX_SMP_LOCK | |
| 41 " cmpxchgq %3, %1; " | |
| 42 " setz %b0; " | |
| 43 " movzbq %b0, %0; " | |
| 44 | |
| 45 : "=a" (res) : "m" (*lock), "a" (old), "r" (set) : "cc", "memory"); | |
| 46 | |
| 47 return res; | |
| 48 } | |
| 49 | |
| 50 | |
| 51 /* | |
| 52 * "xaddq r, [m]": | |
| 53 * | |
| 54 * temp = [m]; | |
| 55 * [m] += r; | |
| 56 * r = temp; | |
| 57 * | |
| 58 * | |
| 59 * The "+r" is any register, %rax (%r0) - %r16. | |
| 60 * The "cc" means that flags were changed. | |
| 61 */ | |
| 62 | |
| 63 static ngx_inline ngx_atomic_int_t | |
| 64 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
| 65 { | |
| 66 __asm__ volatile ( | |
| 67 | |
| 68 NGX_SMP_LOCK | |
| 69 " xaddq %0, %1; " | |
| 70 | |
| 71 : "+q" (add) : "m" (*value) : "cc", "memory"); | |
| 72 | |
| 73 return add; | |
| 74 } | |
| 563 | 75 |
| 76 | |
| 77 #define ngx_memory_barrier() __asm__ volatile ("" ::: "memory") |