Nginx之main初探ngx_init_cycle()(上)
由於ngx_init_cycle()函數非常龐大,這裡只給出前400+行的函數呼叫關係,後400+將在後面的文章中給出。
-->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 <= 'Z') ? (c | 0x20) : 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()
下面是陌生函數的用法和小知識點:
註1:time()與localtime()函數不是Nginx註1:
time()與localtime()函數不是Nginx。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;
}
程式輸出結果:<span style="white-space:pre"> </span>Local time is: Fri Jul 31 05:00:00 4461676
說一般都是4位元組。
/** * 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; }
4 8