nginx/src/os/unix/ngx_process.h

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  */
   5
   6
   7 #ifndef _NGX_PROCESS_H_INCLUDED_
   8 #define _NGX_PROCESS_H_INCLUDED_
   9
  10
  11 #include <ngx_setproctitle.h>
  12
  13
  14 typedef pid_t       ngx_pid_t;
  15
  16 #define NGX_INVALID_PID  -1
  17
  18 typedef void (*ngx_spawn_proc_pt) (ngx_cycle_t *cycle, void *data);
  19
  20 typedef struct {
  21     ngx_pid_t           pid;
  22     int                 status;
  23     ngx_socket_t        channel[2];
  24
  25     ngx_spawn_proc_pt   proc;
  26     void               *data;
  27     char               *name;
  28
  29     unsigned            respawn:1;
  30     unsigned            just_respawn:1;
  31     unsigned            detached:1;
  32     unsigned            exiting:1;
  33     unsigned            exited:1;
  34 } ngx_process_t;
  35
  36
  37 typedef struct {
  38     char         *path;
  39     char         *name;
  40     char *const  *argv;
  41     char *const  *envp;
  42 } ngx_exec_ctx_t;
  43
  44
  45 #define NGX_MAX_PROCESSES         1024
  46
  47 #define NGX_PROCESS_NORESPAWN     -1
  48 #define NGX_PROCESS_RESPAWN       -2
  49 #define NGX_PROCESS_JUST_RESPAWN  -3
  50 #define NGX_PROCESS_DETACHED      -4
  51
  52
  53 #define ngx_getpid   getpid
  54
  55 #ifndef ngx_log_pid
  56 #define ngx_log_pid  ngx_pid
  57 #endif
  58
  59
  60 ngx_pid_t ngx_spawn_process(ngx_cycle_t *cycle,
  61     ngx_spawn_proc_pt proc, void *data, char *name, ngx_int_t respawn);
  62 ngx_pid_t ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx);
  63 ngx_int_t ngx_init_signals(ngx_log_t *log);
  64 void ngx_debug_point(void);
  65
  66
  67 #if (NGX_HAVE_SCHED_YIELD)
  68 #define ngx_sched_yield()  sched_yield()
  69 #else
  70 #define ngx_sched_yield()  usleep(1)
  71 #endif
  72
  73
  74 extern int            ngx_argc;
  75 extern char         **ngx_argv;
  76 extern char         **ngx_os_argv;
  77
  78 extern ngx_pid_t      ngx_pid;
  79 extern ngx_socket_t   ngx_channel;
  80 extern ngx_int_t      ngx_process_slot;
  81 extern ngx_int_t      ngx_last_process;
  82 extern ngx_process_t  ngx_processes[NGX_MAX_PROCESSES];
  83
  84
  85 #endif /* _NGX_PROCESS_H_INCLUDED_ */