static bool init_gethostbyname_thread (struct connectdata *conn, const char *hostname, int port) { struct thread_data *td = malloc(sizeof(*td)); if (!td) { SetLastError(ENOMEM); return (0); } memset (td, 0, sizeof(*td)); Curl_safefree(conn->async.hostname); conn->async.hostname = strdup(hostname); if (!conn->async.hostname) { free(td); SetLastError(ENOMEM); return (0); } conn->async.port = port; conn->async.done = FALSE; conn->async.status = 0; conn->async.dns = NULL; conn->async.os_specific = (void*) td; td->thread_hnd = CreateThread(NULL, 0, gethostbyname_thread, conn, 0, &td->thread_id); if (!td->thread_hnd) { TRACE(("CreateThread() failed; %lu\n", GetLastError())); destroy_thread_data(conn); return (0); } return (1); }
/* called to check if the name is resolved now */ CURLcode Curl_wait_for_resolv(struct connectdata *conn, struct Curl_dns_entry **entry) { struct thread_data *td = (struct thread_data*) conn->async.os_specific; struct SessionHandle *data = conn->data; long timeout; DWORD status, ticks; CURLcode rc; curlassert (conn && td); /* now, see if there's a connect timeout or a regular timeout to use instead of the default one */ timeout = conn->data->set.connecttimeout ? conn->data->set.connecttimeout : conn->data->set.timeout ? conn->data->set.timeout : 300; /* default name resolve timeout in seconds */ ticks = GetTickCount(); status = WaitForSingleObject(td->thread_hnd, 1000UL*timeout); if (status == WAIT_OBJECT_0 || status == WAIT_ABANDONED) { /* Thread finished before timeout; propagate Winsock error to this thread */ WSASetLastError(conn->async.status); GetExitCodeThread(td->thread_hnd, &td->thread_status); TRACE(("status %lu, thread-status %08lX\n", status, td->thread_status)); } else { conn->async.done = TRUE; TerminateThread(td->thread_hnd, (DWORD)-1); td->thread_status = (DWORD)-1; } TRACE(("gethostbyname_thread() retval %08lX, elapsed %lu ms\n", td->thread_status, GetTickCount()-ticks)); if(entry) *entry = conn->async.dns; rc = CURLE_OK; if (!conn->async.dns) { /* a name was not resolved */ if (td->thread_status == (DWORD)-1 || conn->async.status == NO_DATA) { failf(data, "Resolving host timed out: %s", conn->name); rc = CURLE_OPERATION_TIMEDOUT; } else if(conn->async.done) { failf(data, "Could not resolve host: %s (code %lu)", conn->name, conn->async.status); rc = CURLE_COULDNT_RESOLVE_HOST; } else rc = CURLE_OPERATION_TIMEDOUT; destroy_thread_data(conn); /* close the connection, since we can't return failure here without cleaning up this connection properly */ Curl_disconnect(conn); } return (rc); }
/* * init_resolve_thread() starts a new thread that performs the actual * resolve. This function returns before the resolve is done. * * Returns FALSE in case of failure, otherwise TRUE. */ static bool init_resolve_thread (struct connectdata *conn, const char *hostname, int port, const Curl_addrinfo *hints) { struct thread_data *td = calloc(sizeof(*td), 1); if (!td) { SetLastError(ENOMEM); return FALSE; } Curl_safefree(conn->async.hostname); conn->async.hostname = strdup(hostname); if (!conn->async.hostname) { free(td); SetLastError(ENOMEM); return FALSE; } conn->async.port = port; conn->async.done = FALSE; conn->async.status = 0; conn->async.dns = NULL; conn->async.os_specific = (void*) td; td->dummy_sock = CURL_SOCKET_BAD; td->stderr_file = stderr; td->thread_hnd = (HANDLE) _beginthreadex(NULL, 0, THREAD_FUNC, conn, 0, &td->thread_id); #ifdef CURLRES_IPV6 curlassert(hints); td->hints = *hints; #else (void) hints; #endif if (!td->thread_hnd) { SetLastError(errno); TRACE(("_beginthreadex() failed; %s\n", Curl_strerror(conn,errno))); destroy_thread_data(&conn->async); return FALSE; } /* This socket is only to keep Curl_fdset() and select() happy; should never * become signalled for read/write since it's unbound but Windows needs * atleast 1 socket in select(). */ td->dummy_sock = socket(AF_INET, SOCK_DGRAM, 0); return TRUE; }
static void thread_exit_handler(void) { lc_thread_t *thr = get_my_locked_locks(); if (thr) { if (thr->locked.first) { erts_fprintf(stderr, "Thread exiting while having locked locks!\n"); print_curr_locks(thr); lc_abort(); } destroy_thread_data(thr); /* erts_tsd_set(locks_key, NULL); */ } }
/* * Curl_is_resolved() is called repeatedly to check if a previous name resolve * request has completed. It should also make sure to time-out if the * operation seems to take too long. */ CURLcode Curl_is_resolved( struct connectdata *conn, struct Curl_dns_entry **entry ) { *entry = NULL; if ( conn->async.done ) { /* we're done */ destroy_thread_data( &conn->async ); if ( !conn->async.dns ) { TRACE( ( "Curl_is_resolved(): CURLE_COULDNT_RESOLVE_HOST\n" ) ); return CURLE_COULDNT_RESOLVE_HOST; } *entry = conn->async.dns; TRACE( ( "resolved okay, dns %p\n", *entry ) ); } else { TRACE( ( "not yet\n" ) ); } return CURLE_OK; }
void client_main(unsigned short port, int connections, const char * hostName) { int i; SECStatus secStatus; PRStatus prStatus; PRInt32 rv; PRNetAddr addr; PRHostEnt hostEntry; char buffer[PR_NETDB_BUF_SIZE]; /* Setup network connection. */ prStatus = PR_GetHostByName(hostName, buffer, sizeof(buffer), &hostEntry); if (prStatus != PR_SUCCESS) { exitErr("PR_GetHostByName"); } rv = PR_EnumerateHostEnt(0, &hostEntry, port, &addr); if (rv < 0) { exitErr("PR_EnumerateHostEnt"); } secStatus = launch_thread(&threadMGR, do_connects, &addr, 1); if (secStatus != SECSuccess) { exitErr("launch_thread"); } if (connections > 1) { /* wait for the first connection to terminate, then launch the rest. */ reap_threads(&threadMGR); /* Start up the connections */ for (i = 2; i <= connections; ++i) { secStatus = launch_thread(&threadMGR, do_connects, &addr, i); if (secStatus != SECSuccess) { errWarn("launch_thread"); } } } reap_threads(&threadMGR); destroy_thread_data(&threadMGR); }
/* * Curl_wait_for_resolv() waits for a resolve to finish. This function should * be avoided since using this risk getting the multi interface to "hang". * * If 'entry' is non-NULL, make it point to the resolved dns entry * * This is the version for resolves-in-a-thread. */ CURLcode Curl_wait_for_resolv(struct connectdata *conn, struct Curl_dns_entry **entry) { struct thread_data *td = (struct thread_data*) conn->async.os_specific; struct SessionHandle *data = conn->data; long timeout; DWORD status, ticks; CURLcode rc; curlassert (conn && td); /* now, see if there's a connect timeout or a regular timeout to use instead of the default one */ timeout = conn->data->set.connecttimeout ? conn->data->set.connecttimeout : conn->data->set.timeout ? conn->data->set.timeout : CURL_TIMEOUT_RESOLVE; /* default name resolve timeout */ ticks = GetTickCount(); (void)ticks; status = WaitForSingleObject(td->thread_hnd, 1000UL*timeout); if (status == WAIT_OBJECT_0 || status == WAIT_ABANDONED) { /* Thread finished before timeout; propagate Winsock error to this thread. * 'conn->async.done = TRUE' is set in Curl_addrinfo4/6_callback(). */ WSASetLastError(conn->async.status); GetExitCodeThread(td->thread_hnd, &td->thread_status); TRACE(("%s() status %lu, thread retval %lu, ", THREAD_NAME, status, td->thread_status)); } else { conn->async.done = TRUE; td->thread_status = (DWORD)-1; TRACE(("%s() timeout, ", THREAD_NAME)); } TRACE(("elapsed %lu ms\n", GetTickCount()-ticks)); CloseHandle(td->thread_hnd); if(entry) *entry = conn->async.dns; rc = CURLE_OK; if (!conn->async.dns) { /* a name was not resolved */ if (td->thread_status == (DWORD)-1 || conn->async.status == NO_DATA) { failf(data, "Resolving host timed out: %s", conn->host.name); rc = CURLE_OPERATION_TIMEDOUT; } else if(conn->async.done) { failf(data, "Could not resolve host: %s; %s", conn->host.name, Curl_strerror(conn,conn->async.status)); rc = CURLE_COULDNT_RESOLVE_HOST; } else rc = CURLE_OPERATION_TIMEDOUT; } destroy_thread_data(&conn->async); if(CURLE_OK != rc) /* close the connection, since we must not return failure from here without cleaning up this connection properly */ Curl_disconnect(conn); return (rc); }
/* * Curl_wait_for_resolv() waits for a resolve to finish. This function should * be avoided since using this risk getting the multi interface to "hang". * * If 'entry' is non-NULL, make it point to the resolved dns entry * * This is the version for resolves-in-a-thread. */ CURLcode Curl_wait_for_resolv( struct connectdata *conn, struct Curl_dns_entry **entry ) { struct thread_data *td = (struct thread_data*) conn->async.os_specific; struct SessionHandle *data = conn->data; long timeout; DWORD status, ticks; CURLcode rc; curlassert( conn && td ); /* now, see if there's a connect timeout or a regular timeout to use instead of the default one */ timeout = conn->data->set.connecttimeout ? conn->data->set.connecttimeout : conn->data->set.timeout ? conn->data->set.timeout : CURL_TIMEOUT_RESOLVE; /* default name resolve timeout */ ticks = GetTickCount(); /* wait for the thread to resolve the name */ status = WaitForSingleObject( td->event_resolved, 1000UL * timeout ); /* mark that we are now done waiting */ ReleaseMutex( td->mutex_waiting ); /* close our handle to the mutex, no point in hanging on to it */ CloseHandle( td->mutex_waiting ); td->mutex_waiting = NULL; /* close the event handle, it's useless now */ CloseHandle( td->event_resolved ); td->event_resolved = NULL; /* has the resolver thread succeeded in resolving our query ? */ if ( status == WAIT_OBJECT_0 ) { /* wait for the thread to exit, it's in the callback sequence */ if ( WaitForSingleObject( td->thread_hnd, 5000 ) == WAIT_TIMEOUT ) { TerminateThread( td->thread_hnd, 0 ); conn->async.done = TRUE; td->thread_status = (DWORD)-1; TRACE( ( "%s() thread stuck?!, ", THREAD_NAME ) ); } else { /* Thread finished before timeout; propagate Winsock error to this thread. * 'conn->async.done = TRUE' is set in Curl_addrinfo4/6_callback(). */ WSASetLastError( conn->async.status ); GetExitCodeThread( td->thread_hnd, &td->thread_status ); TRACE( ( "%s() status %lu, thread retval %lu, ", THREAD_NAME, status, td->thread_status ) ); } } else { conn->async.done = TRUE; td->thread_status = (DWORD)-1; TRACE( ( "%s() timeout, ", THREAD_NAME ) ); } TRACE( ( "elapsed %lu ms\n", GetTickCount() - ticks ) ); CloseHandle( td->thread_hnd ); if ( entry ) { *entry = conn->async.dns; } rc = CURLE_OK; if ( !conn->async.dns ) { /* a name was not resolved */ if ( td->thread_status == (DWORD)-1 || conn->async.status == NO_DATA ) { failf( data, "Resolving host timed out: %s", conn->host.name ); rc = CURLE_OPERATION_TIMEDOUT; } else if ( conn->async.done ) { failf( data, "Could not resolve host: %s; %s", conn->host.name, Curl_strerror( conn,conn->async.status ) ); rc = CURLE_COULDNT_RESOLVE_HOST; } else { rc = CURLE_OPERATION_TIMEDOUT; } } destroy_thread_data( &conn->async ); if ( CURLE_OK != rc ) { /* close the connection, since we must not return failure from here without cleaning up this connection properly */ Curl_disconnect( conn ); } return ( rc ); }