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view src/os/unix/ngx_thread.h @ 8826:3436b441239b quic

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HTTP/3: proper uni stream closure detection. Previously, closure detection for server-initiated uni streams was not properly implemented. Instead, HTTP/3 code relied on QUIC code posting the read event and setting rev->error when it needed to close the stream. Then, regular uni stream read handler called c->recv() and received error, which closed the stream. This was an ad-hoc solution. If, for whatever reason, the read handler was called earlier, c->recv() would return 0, which would also close the stream. Now server-initiated uni streams have a separate read event handler for tracking stream closure. The handler calls c->recv(), which normally returns 0, but may return error in case of closure.
author Roman Arutyunyan <arut@nginx.com>
date Mon, 31 Jan 2022 09:46:30 +0300
parents d230c797b168
children
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_THREAD_H_INCLUDED_
#define _NGX_THREAD_H_INCLUDED_


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

#if (NGX_THREADS)

#include <pthread.h>


typedef pthread_mutex_t  ngx_thread_mutex_t;

ngx_int_t ngx_thread_mutex_create(ngx_thread_mutex_t *mtx, ngx_log_t *log);
ngx_int_t ngx_thread_mutex_destroy(ngx_thread_mutex_t *mtx, ngx_log_t *log);
ngx_int_t ngx_thread_mutex_lock(ngx_thread_mutex_t *mtx, ngx_log_t *log);
ngx_int_t ngx_thread_mutex_unlock(ngx_thread_mutex_t *mtx, ngx_log_t *log);


typedef pthread_cond_t  ngx_thread_cond_t;

ngx_int_t ngx_thread_cond_create(ngx_thread_cond_t *cond, ngx_log_t *log);
ngx_int_t ngx_thread_cond_destroy(ngx_thread_cond_t *cond, ngx_log_t *log);
ngx_int_t ngx_thread_cond_signal(ngx_thread_cond_t *cond, ngx_log_t *log);
ngx_int_t ngx_thread_cond_wait(ngx_thread_cond_t *cond, ngx_thread_mutex_t *mtx,
    ngx_log_t *log);


#if (NGX_LINUX)

typedef pid_t      ngx_tid_t;
#define NGX_TID_T_FMT         "%P"

#elif (NGX_FREEBSD)

typedef uint32_t   ngx_tid_t;
#define NGX_TID_T_FMT         "%uD"

#elif (NGX_DARWIN)

typedef uint64_t   ngx_tid_t;
#define NGX_TID_T_FMT         "%uL"

#else

typedef uint64_t   ngx_tid_t;
#define NGX_TID_T_FMT         "%uL"

#endif

ngx_tid_t ngx_thread_tid(void);

#define ngx_log_tid           ngx_thread_tid()

#else

#define ngx_log_tid           0
#define NGX_TID_T_FMT         "%d"

#endif


#endif /* _NGX_THREAD_H_INCLUDED_ */