Mercurial > hg > nginx-quic

view src/core/ngx_shmtx.h @ 5111:57c3f84d72ce

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Request body: avoid linking rb->buf to r->header_in. Code to reuse of r->request_body->buf in upstream module assumes it's dedicated buffer, hence after 1.3.9 (r4931) it might reuse r->header_in if client_body_in_file_only was set, resulting in original request corruption. It is considered to be safer to always create a dedicated buffer for rb->bufs to avoid such problems.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 14 Mar 2013 12:30:26 +0000
parents 512c741fa841
children
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_SHMTX_H_INCLUDED_
#define _NGX_SHMTX_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef struct {
    ngx_atomic_t   lock;
#if (NGX_HAVE_POSIX_SEM)
    ngx_atomic_t   wait;
#endif
} ngx_shmtx_sh_t;


typedef struct {
#if (NGX_HAVE_ATOMIC_OPS)
    ngx_atomic_t  *lock;
#if (NGX_HAVE_POSIX_SEM)
    ngx_atomic_t  *wait;
    ngx_uint_t     semaphore;
    sem_t          sem;
#endif
#else
    ngx_fd_t       fd;
    u_char        *name;
#endif
    ngx_uint_t     spin;
} ngx_shmtx_t;


ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr,
    u_char *name);
void ngx_shmtx_destroy(ngx_shmtx_t *mtx);
ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
void ngx_shmtx_lock(ngx_shmtx_t *mtx);
void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
ngx_uint_t ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid);


#endif /* _NGX_SHMTX_H_INCLUDED_ */