Nginx之main初探ngx_init_cycle()（上）
由于ngx_init_cycle()函数非常庞大，这里只给出前400+行的函数调用关系，后400+将在后面的文章中给出。
-->ngx_init_cycle(&init_cycle) -->ngx_timezone_update() -->time() -->localtime()注1： -->ngx_timeofday() -->ngx_time_update() -->ngx_gettimeofday() -- gettimeofday() -->ngx_gmtime() -->ngx_localtime() -->ngx_memory_barrier() -->ngx_increase_pipe_generation() -->ngx_create_pool() -->ngx_memalign() -- ngx_alloc(size, log) -->ngx_pcalloc() -->ngx_palloc() -->ngx_align_ptr()注2： -->ngx_palloc_block() -->ngx_memalign() -->ngx_align_ptr() -->ngx_palloc_large() -->ngx_alloc() -->malloc() -->ngx_palloc() -->ngx_memzero() -->memset() -->ngx_list_init() -->ngx_palloc() -->ngx_queue_init() -->ngx_strlen() -- strlen() -->ngx_pnalloc() -->ngx_palloc_block() -->ngx_palloc_large() -->ngx_strlow() -->ngx_tolower() -- ((c >= 'A' && c ngx_array_create() -->ngx_palloc() -->ngx_array_init() -->ngx_palloc() -->ngx_conf_param() -->ngx_memzero() -->ngx_conf_parse() -->ngx_conf_parse() -->ngx_open_file() -- open() -->ngx_fd_info() -- fstat() -->ngx_alloc() -->ngx_conf_read_token() -->ngx_file_size() -->ngx_memmove() -- memmove() -->ngx_read_file() -- read() -->ngx_write_console() -- ngx_write_fd() --> write() -->ngx_array_push() -->ngx_conf_handler() -->ngx_show_dso_directives() -->ngx_get_conf() -->ngx_is_dynamic_module() -->ngx_get_conf() -->ngx_test_lockfile() -->ngx_open_file() -->ngx_close_file() -->ngx_delete_file() -->ngx_create_paths() -->ngx_create_dir() -- mkdir() -->ngx_file_info() -->ngx_log_open_default() -->ngx_conf_open_file()
下面是陌生函数的用法和小知识点：
注1：time()与localtime()函数不是Nginx自己实现的，是库函数。其用法如下
/**
* filename: test_localtime.c
* description: used to see the usage of function localtime()
* date: 2015-03-06
* author: HowardKing
* version: 1.0
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void)
{
time_t timer; // time_t is long int
struct tm *tblock;
time(NULL);
tblock = localtime(&timer);
printf("Local time is: %s", asctime(tblock));
return 0;
}</time.h></stdlib.h></stdio.h><span style="white-space:pre"> </span>Local time is: Fri Jul 31 05:00:00 4461676
/**
* filename: test_unsigned_long.c
* description: find out the size of type long
* date: 20150306
* author: HowardKing
* version: v1.0
*/
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
int ii = 100;
unsigned long ll = 100;
printf("%d\n", sizeof(ii));
printf("%d\n", sizeof(ll));
return 0;
}</stdlib.h></stdio.h>4 8
以上就介绍了Nginx之main初探ngx_init_cycle()（上），包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
