mirror of
https://github.com/cesanta/mongoose.git
synced 2024-12-05 10:58:59 +08:00
82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
// Copyright (c) 2020 Cesanta Software Limited
|
|
// All rights reserved
|
|
//
|
|
// Multithreading example.
|
|
// For each incoming request, we spawn a separate thread, that sleeps for
|
|
// some time to simulate long processing time, produces an output and
|
|
// hands over that output to the request handler function.
|
|
//
|
|
// The following procedure is used to benchmark the multi-threaded codepath
|
|
// against the single-threaded codepath on MacOS:
|
|
// $ make clean all CFLAGS="-DSLEEP_TIME=0 -DMG_ENABLE_SOCKETPAIR=1"
|
|
// $ siege -c50 -t5s http://localhost:8000/multi
|
|
// $ siege -c50 -t5s http://localhost:8000/fast
|
|
//
|
|
// If, during the test, there are socket errors, increase ephemeral port limit:
|
|
// $ sysctl -a | grep portrange
|
|
// $ sudo sysctl -w net.inet.ip.portrange.first=32768
|
|
// $ sudo sysctl -w net.inet.ip.portrange.hifirst=32768
|
|
|
|
#include "mongoose.h"
|
|
|
|
static void start_thread(void (*f)(void *), void *p) {
|
|
#ifdef _WIN32
|
|
_beginthread((void(__cdecl *)(void *)) f, 0, p);
|
|
#else
|
|
#define closesocket(x) close(x)
|
|
#include <pthread.h>
|
|
pthread_t thread_id = (pthread_t) 0;
|
|
pthread_attr_t attr;
|
|
(void) pthread_attr_init(&attr);
|
|
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
|
|
pthread_create(&thread_id, &attr, (void *(*) (void *) ) f, p);
|
|
pthread_attr_destroy(&attr);
|
|
#endif
|
|
}
|
|
|
|
static void thread_function(void *param) {
|
|
struct mg_connection *c = param; // Pipe connection
|
|
mg_usleep(2 * 1000000); // Simulate long execution
|
|
mg_mgr_wakeup(c); // Wakeup event manager
|
|
}
|
|
|
|
// HTTP request callback
|
|
static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
|
|
if (ev == MG_EV_HTTP_MSG) {
|
|
struct mg_http_message *hm = (struct mg_http_message *) ev_data;
|
|
if (mg_http_match_uri(hm, "/fast")) {
|
|
// Single-threaded code path, for performance comparison
|
|
// The /fast URI responds immediately
|
|
mg_http_reply(c, 200, "Host: foo.com\r\n", "hi\n");
|
|
} else {
|
|
// Multithreading code path
|
|
c->label[0] = 'W'; // Mark us as waiting for data
|
|
start_thread(thread_function, fn_data); // Start handling thread
|
|
}
|
|
}
|
|
}
|
|
|
|
// Pipe event handler
|
|
static void pcb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
|
|
if (ev == MG_EV_READ) {
|
|
struct mg_connection *t;
|
|
for (t = c->mgr->conns; t != NULL; t = t->next) {
|
|
if (t->label[0] != 'W') continue; // Ignore un-marked connections
|
|
mg_http_reply(t, 200, "Host: foo.com\r\n", "hi\n"); // Respond!
|
|
t->label[0] = 0; // Clear mark
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(void) {
|
|
struct mg_mgr mgr;
|
|
struct mg_connection *pipe; // Used to wake up event manager
|
|
mg_mgr_init(&mgr);
|
|
mg_log_set("3");
|
|
pipe = mg_mkpipe(&mgr, pcb, NULL); // Create pipe
|
|
mg_http_listen(&mgr, "http://localhost:8000", fn, pipe); // Create listener
|
|
for (;;) mg_mgr_poll(&mgr, 1000); // Event loop
|
|
mg_mgr_free(&mgr); // Cleanup
|
|
return 0;
|
|
}
|