diff options
author | Konstantin Ananyev <konstantin.ananyev@intel.com> | 2017-10-31 12:40:17 +0000 |
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committer | Konstantin Ananyev <konstantin.ananyev@intel.com> | 2017-10-31 14:19:39 +0000 |
commit | e18a033b921d0d79fa8278f853548e6125b93e0c (patch) | |
tree | a6a55edf6ddceef824561818c9836914c326340d /app/nginx/src/core/ngx_rwlock.c | |
parent | 7e18fa1bf263822c46d7431a911b41d6377d5f69 (diff) |
Integrate TLDK with NGINX
Created a clone of nginx (from https://github.com/nginx/nginx)
to demonstrate and benchmark TLDK library integrated with real
world application.
A new nginx module is created and and BSD socket-like API is implemented
on top of native TLDK API.
Note, that right now only minimalistic subset of socket-like API is provided:
- accept
- close
- readv
- recv
- writev
so only limited nginx functionality is available for a moment.
Change-Id: Ie1efe9349a0538da4348a48fb8306cbf636b5a92
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Diffstat (limited to 'app/nginx/src/core/ngx_rwlock.c')
-rw-r--r-- | app/nginx/src/core/ngx_rwlock.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/app/nginx/src/core/ngx_rwlock.c b/app/nginx/src/core/ngx_rwlock.c new file mode 100644 index 0000000..905de78 --- /dev/null +++ b/app/nginx/src/core/ngx_rwlock.c @@ -0,0 +1,120 @@ + +/* + * Copyright (C) Ruslan Ermilov + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> + + +#if (NGX_HAVE_ATOMIC_OPS) + + +#define NGX_RWLOCK_SPIN 2048 +#define NGX_RWLOCK_WLOCK ((ngx_atomic_uint_t) -1) + + +void +ngx_rwlock_wlock(ngx_atomic_t *lock) +{ + ngx_uint_t i, n; + + for ( ;; ) { + + if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, NGX_RWLOCK_WLOCK)) { + return; + } + + if (ngx_ncpu > 1) { + + for (n = 1; n < NGX_RWLOCK_SPIN; n <<= 1) { + + for (i = 0; i < n; i++) { + ngx_cpu_pause(); + } + + if (*lock == 0 + && ngx_atomic_cmp_set(lock, 0, NGX_RWLOCK_WLOCK)) + { + return; + } + } + } + + ngx_sched_yield(); + } +} + + +void +ngx_rwlock_rlock(ngx_atomic_t *lock) +{ + ngx_uint_t i, n; + ngx_atomic_uint_t readers; + + for ( ;; ) { + readers = *lock; + + if (readers != NGX_RWLOCK_WLOCK + && ngx_atomic_cmp_set(lock, readers, readers + 1)) + { + return; + } + + if (ngx_ncpu > 1) { + + for (n = 1; n < NGX_RWLOCK_SPIN; n <<= 1) { + + for (i = 0; i < n; i++) { + ngx_cpu_pause(); + } + + readers = *lock; + + if (readers != NGX_RWLOCK_WLOCK + && ngx_atomic_cmp_set(lock, readers, readers + 1)) + { + return; + } + } + } + + ngx_sched_yield(); + } +} + + +void +ngx_rwlock_unlock(ngx_atomic_t *lock) +{ + ngx_atomic_uint_t readers; + + readers = *lock; + + if (readers == NGX_RWLOCK_WLOCK) { + *lock = 0; + return; + } + + for ( ;; ) { + + if (ngx_atomic_cmp_set(lock, readers, readers - 1)) { + return; + } + + readers = *lock; + } +} + + +#else + +#if (NGX_HTTP_UPSTREAM_ZONE || NGX_STREAM_UPSTREAM_ZONE) + +#error ngx_atomic_cmp_set() is not defined! + +#endif + +#endif |