C - pthread_create - Clang GCC difference -


passing argument pthread_create clang (3.6.1) , gcc (5.1.0) brings different results strange case, illustrated here:

pthread_t spawn_bserver_thread(uint16_t portno) {        pthread_t tid;     int32_t sockfd = create_bserver(portno);     set_nonblocking(sockfd);      exit_ncurses();     printf("%d\n", sockfd);      if(pthread_create(&tid, null, bserver_thread, &sockfd) != 0)         error("pthread_create");      return tid; }

and bserver_thread:

static void * bserver_thread(void *arg) {     printf("%d\n", *(int32_t*)arg);     exit(1);     ... }

with gcc prints same number, not clang. (my typical result 4 , 4 gcc 4 32767 clang). doing wrong here?

here cflags if can change anything: -wall -wextra -ggdb

the problem have no control on when thread starts run, spawn_bserver_thread function may exit before thread function starts, meaning sockfd variable goes out of scope , pointer argument bserver_thread function no longer valid.


Comments

Post a Comment

Popular posts from this blog

node.js - Using Node without global install -

i'm working on few node & electron (atom shell) projects , i'm curious how them work without user having install node globally. i've seen few applications including node directory in project contains node.exe binary. how go setting node project use binary? edit: thought should add, i've searched everywhere answer this, unrelated results.
Read more

How to access a php class file from PHPFox framework into javascript code written in simple HTML file? -

i've website developed using phpfox v3.0.7 . now i'm trying implement 'sse(server sent events)' 1 of php files. reference i'm giving below necessary code part of file. file titled process.class.php , present @ location /var/www/module/notification/include/service/process.class.php present on server having ip http://34.124.40.142/ . <?php /** * [phpfox_header] */ header('content-type: text/event-stream'); header('cache-control: no-cache'); defined('phpfox') or exit('no dice!'); /** * * * @copyright [phpfox_copyright] * @author raymond benc * @package phpfox_service * @version $id: service.class.php 67 2009-01-20 11:32:45z raymond_benc $ */ class notification_service_process extends phpfox_service { /** * class constructor */ public function __construct() { $this->_stable = phpfox::gett('notification'); } public function add($...
Read more

java - Null response to php query in android, even though php works properly -

Image
table i'm trying retrieve above data using 2 php files below. want pass email parameter , return bets user = email. work fine when tested advanced rest client, problem not php. however, when try through android 2 java classes below, null pointer exception (logcat below) , json object returned null. i'm not sure error is, think i'm not passing parameter php , that's why it's producing null response. logcat 05-31 15:10:50.227 26074-26074/com.example.albert.betterapp e/androidruntime﹕ fatal exception: main process: com.example.albert.betterapp, pid: 26074 java.lang.runtimeexception: unable start activity componentinfo{com.example.albert.betterapp/com.example.albert.betterapp.displayallbets}: java.lang.nullpointerexception @ android.app.activitythread.performlaunchactivity(activitythread.java:2292) @ android.app.activitythread.handlelaunchactivity(activitythread.java:2350) @ android.app.activitythread.acce...
Read more