nginx/src/os/unix/ngx_thread.h

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  */
   5
   6
   7 #ifndef _NGX_THREAD_H_INCLUDED_
   8 #define _NGX_THREAD_H_INCLUDED_
   9
  10
  11 #include <ngx_config.h>
  12 #include <ngx_core.h>
  13
  14 #if (NGX_THREADS)
  15
  16 #define NGX_MAX_THREADS      128
  17
  18 #if (NGX_USE_RFORK)
  19 #include <ngx_freebsd_rfork_thread.h>
  20
  21
  22 #else /* use pthreads */
  23
  24 #include <pthread.h>
  25
  26 typedef pthread_t                    ngx_tid_t;
  27
  28 #define ngx_thread_self()            pthread_self()
  29 #define ngx_log_tid                  (int) ngx_thread_self()
  30
  31 #if (NGX_FREEBSD) && !(NGX_LINUXTHREADS)
  32 #define NGX_TID_T_FMT                "%p"
  33 #else
  34 #define NGX_TID_T_FMT                "%d"
  35 #endif
  36
  37
  38 typedef pthread_key_t                ngx_tls_key_t;
  39
  40 #define ngx_thread_key_create(key)   pthread_key_create(key, NULL)
  41 #define ngx_thread_key_create_n      "pthread_key_create()"
  42 #define ngx_thread_set_tls           pthread_setspecific
  43 #define ngx_thread_set_tls_n         "pthread_setspecific()"
  44 #define ngx_thread_get_tls           pthread_getspecific
  45
  46
  47 #define NGX_MUTEX_LIGHT     0
  48
  49 typedef struct {
  50     pthread_mutex_t   mutex;
  51     ngx_log_t        *log;
  52 } ngx_mutex_t;
  53
  54 typedef struct {
  55     pthread_cond_t    cond;
  56     ngx_log_t        *log;
  57 } ngx_cond_t;
  58
  59 #define ngx_thread_sigmask     pthread_sigmask
  60 #define ngx_thread_sigmask_n  "pthread_sigmask()"
  61
  62 #define ngx_thread_join(t, p)  pthread_join(t, p)
  63
  64 #define ngx_setthrtitle(n)
  65
  66
  67
  68 ngx_int_t ngx_mutex_trylock(ngx_mutex_t *m);
  69 void ngx_mutex_lock(ngx_mutex_t *m);
  70 void ngx_mutex_unlock(ngx_mutex_t *m);
  71
  72 #endif
  73
  74
  75 #define ngx_thread_volatile   volatile
  76
  77
  78 typedef struct {
  79     ngx_tid_t    tid;
  80     ngx_cond_t  *cv;
  81     ngx_uint_t   state;
  82 } ngx_thread_t;
  83
  84 #define NGX_THREAD_FREE   1
  85 #define NGX_THREAD_BUSY   2
  86 #define NGX_THREAD_EXIT   3
  87 #define NGX_THREAD_DONE   4
  88
  89 extern ngx_int_t              ngx_threads_n;
  90 extern volatile ngx_thread_t  ngx_threads[NGX_MAX_THREADS];
  91
  92
  93 typedef void *  ngx_thread_value_t;
  94
  95 ngx_int_t ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle);
  96 ngx_err_t ngx_create_thread(ngx_tid_t *tid,
  97     ngx_thread_value_t (*func)(void *arg), void *arg, ngx_log_t *log);
  98
  99 ngx_mutex_t *ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags);
 100 void ngx_mutex_destroy(ngx_mutex_t *m);
 101
 102
 103 ngx_cond_t *ngx_cond_init(ngx_log_t *log);
 104 void ngx_cond_destroy(ngx_cond_t *cv);
 105 ngx_int_t ngx_cond_wait(ngx_cond_t *cv, ngx_mutex_t *m);
 106 ngx_int_t ngx_cond_signal(ngx_cond_t *cv);
 107
 108
 109 #else /* !NGX_THREADS */
 110
 111 #define ngx_thread_volatile
 112
 113 #define ngx_log_tid           0
 114 #define NGX_TID_T_FMT         "%d"
 115
 116 #define ngx_mutex_trylock(m)  NGX_OK
 117 #define ngx_mutex_lock(m)
 118 #define ngx_mutex_unlock(m)
 119
 120 #define ngx_cond_signal(cv)
 121
 122 #define ngx_thread_main()     1
 123
 124 #endif
 125
 126
 127
 128 #endif /* _NGX_THREAD_H_INCLUDED_ */