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Diffstat (limited to 'libstdc++-v3/testsuite/thread/pthread1.cc')
-rw-r--r-- | libstdc++-v3/testsuite/thread/pthread1.cc | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/thread/pthread1.cc b/libstdc++-v3/testsuite/thread/pthread1.cc new file mode 100644 index 00000000000..f51881a9036 --- /dev/null +++ b/libstdc++-v3/testsuite/thread/pthread1.cc @@ -0,0 +1,143 @@ +// 2002-01-23 Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org> +// +// Copyright (C) 2002 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 2, 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 COPYING. If not, write to the Free +// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// USA. + +// { dg-do run { target *-*-freebsd* *-*-linux* *-*-solaris* } } +// { dg-options "-pthread" { target *-*-freebsd* *-*-linux* } } +// { dg-options "-pthreads" { target *-*-solaris* } } + +// This multi-threading C++/STL/POSIX code adheres to rules outlined here: +// http://www.sgi.com/tech/stl/thread_safety.html +// +// It is believed to exercise the allocation code in a manner that +// should reveal memory leaks (and, under rare cases, race conditions, +// if the STL threading support is fubar'd). + +#include <list> + +// Do not include <pthread.h> explicitly; if threads are properly +// configured for the port, then it is picked up free from STL headers. + +#if __GTHREADS +using namespace std; + +const int thread_cycles = 10; +const int thread_pairs = 10; +const unsigned max_size = 100; +const int iters = 10000; + +class task_queue +{ +public: + task_queue () + { + pthread_mutex_init (&fooLock, NULL); + pthread_cond_init (&fooCond, NULL); + } + ~task_queue () + { + pthread_mutex_destroy (&fooLock); + pthread_cond_destroy (&fooCond); + } + list<int> foo; + pthread_mutex_t fooLock; + // This code uses a special case that allows us to use just one + // condition variable - in general, don't use this idiom unless you + // know what you are doing. ;-) + pthread_cond_t fooCond; +}; + +void* +produce (void* t) +{ + task_queue& tq = *(static_cast<task_queue*> (t)); + int num = 0; + while (num < iters) + { + pthread_mutex_lock (&tq.fooLock); + while (tq.foo.size () >= max_size) + pthread_cond_wait (&tq.fooCond, &tq.fooLock); + tq.foo.push_back (num++); + pthread_cond_signal (&tq.fooCond); + pthread_mutex_unlock (&tq.fooLock); + } + return 0; +} + +void* +consume (void* t) +{ + task_queue& tq = *(static_cast<task_queue*> (t)); + int num = 0; + while (num < iters) + { + pthread_mutex_lock (&tq.fooLock); + while (tq.foo.size () == 0) + pthread_cond_wait (&tq.fooCond, &tq.fooLock); + if (tq.foo.front () != num++) + abort (); + tq.foo.pop_front (); + pthread_cond_signal (&tq.fooCond); + pthread_mutex_unlock (&tq.fooLock); + } + return 0; +} + +int +main (int argc, char** argv) +{ + pthread_t prod[thread_pairs]; + pthread_t cons[thread_pairs]; + + task_queue* tq[thread_pairs]; + +#if defined(__sun) && defined(__svr4__) + pthread_setconcurrency (thread_pairs * 2); +#endif + + for (int j = 0; j < thread_cycles; j++) + { + for (int i = 0; i < thread_pairs; i++) + { + tq[i] = new task_queue; + pthread_create (&prod[i], NULL, produce, static_cast<void*> (tq[i])); + pthread_create (&cons[i], NULL, consume, static_cast<void*> (tq[i])); + } + + for (int i = 0; i < thread_pairs; i++) + { + pthread_join (prod[i], NULL); + pthread_join (cons[i], NULL); +#if defined(__FreeBSD__) + // These lines are not required by POSIX since a successful + // join is suppose to detach as well... + pthread_detach (prod[i]); + pthread_detach (cons[i]); + // ...but they are according to the FreeBSD 4.X code base + // or else you get a memory leak. +#endif + delete tq[i]; + } + } + + return 0; +} +#else +int main (void) {} +#endif |