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Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libstdc++-v3/] [testsuite/] [18_support/] [pthread_guard.cc] - Rev 490
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// // Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* } } // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-darwin* alpha*-*-osf* } } #include <cstdlib> #include <pthread.h> // This used to deadlock with the old libstdc++ because there is only one // global mutex guarding initialization of statics and it is held during by // the initializer thread of a static until the variable is completely // initialized. If the initializer thread creates and waits for another thread // which also initializes a static variable, there will be a deadlock because // the first thread is holding the mutex and waiting for the second thread, // which is blocked when it is acquiring the mutex. int get_bar (void) { return 1; } void* do_something (void *arg) { static int bar __attribute__((unused)) = get_bar (); return NULL; } int get_foo (void) { pthread_t new_thread; if (pthread_create (&new_thread, NULL, do_something, NULL) != 0) std::abort (); if (pthread_join (new_thread, NULL) != 0) std::abort (); return 1; } int main (int argc, char **argv) { static int foo __attribute__((unused)) = get_foo (); return 0; }
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