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

#ifndef _NGX_CYCLE_H_INCLUDED_
#define _NGX_CYCLE_H_INCLUDED_

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

#ifndef NGX_CYCLE_POOL_SIZE
#define NGX_CYCLE_POOL_SIZE NGX_DEFAULT_POOL_SIZE
#endif

#define NGX_DEBUG_POINTS_STOP 1
#define NGX_DEBUG_POINTS_ABORT 2

typedef struct ngx_shm_zone_s ngx_shm_zone_t;

typedef ngx_int_t (*ngx_shm_zone_init_pt) (ngx_shm_zone_t *zone, void *data);

struct ngx_shm_zone_s {
void *data;
ngx_shm_t shm;
ngx_shm_zone_init_pt init;
void *tag;
ngx_uint_t noreuse; /* unsigned noreuse:1; */
};

struct ngx_cycle_s {
void ****conf_ctx;
ngx_pool_t *pool;

ngx_log_t *log;
ngx_log_t new_log;

ngx_uint_t log_use_stderr; /* unsigned log_use_stderr:1; */

ngx_connection_t **files;
ngx_connection_t *free_connections;
ngx_uint_t free_connection_n;

ngx_module_t **modules;
ngx_uint_t modules_n;
ngx_uint_t modules_used; /* unsigned modules_used:1; */

ngx_queue_t reusable_connections_queue;

ngx_array_t listening;
ngx_array_t paths;
ngx_array_t config_dump;
ngx_list_t open_files;
ngx_list_t shared_memory;

ngx_uint_t connection_n;
ngx_uint_t files_n;

ngx_connection_t *connections;
ngx_event_t *read_events;
ngx_event_t *write_events;

ngx_cycle_t *old_cycle;

ngx_str_t conf_file;
ngx_str_t conf_param;
ngx_str_t conf_prefix;
ngx_str_t prefix;
ngx_str_t lock_file;
ngx_str_t hostname;
};

typedef struct {
ngx_flag_t daemon;
ngx_flag_t master;

ngx_msec_t timer_resolution;

ngx_int_t worker_processes;
ngx_int_t debug_points;

ngx_int_t rlimit_nofile;
off_t rlimit_core;

int priority;

ngx_uint_t cpu_affinity_auto;
ngx_uint_t cpu_affinity_n;
ngx_cpuset_t *cpu_affinity;

char *username;
ngx_uid_t user;
ngx_gid_t group;

ngx_str_t working_directory;
ngx_str_t lock_file;

ngx_str_t pid;
ngx_str_t oldpid;

ngx_array_t env;
char **environment;
} ngx_core_conf_t;

#define ngx_is_init_cycle(cycle) (cycle->conf_ctx == NULL)

ngx_cycle_t *ngx_init_cycle(ngx_cycle_t *old_cycle);
ngx_int_t ngx_create_pidfile(ngx_str_t *name, ngx_log_t *log);
void ngx_delete_pidfile(ngx_cycle_t *cycle);
ngx_int_t ngx_signal_process(ngx_cycle_t *cycle, char *sig);
void ngx_reopen_files(ngx_cycle_t *cycle, ngx_uid_t user);
char **ngx_set_environment(ngx_cycle_t *cycle, ngx_uint_t *last);
ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv);
ngx_cpuset_t *ngx_get_cpu_affinity(ngx_uint_t n);
ngx_shm_zone_t *ngx_shared_memory_add(ngx_conf_t *cf, ngx_str_t *name,
size_t size, void *tag);

extern volatile ngx_cycle_t *ngx_cycle;
extern ngx_array_t ngx_old_cycles;
extern ngx_module_t ngx_core_module;
extern ngx_uint_t ngx_test_config;
extern ngx_uint_t ngx_dump_config;
extern ngx_uint_t ngx_quiet_mode;

#endif /* _NGX_CYCLE_H_INCLUDED_ */

NGINX----源码阅读---cycle