#include <string>
#include <list>
using namespace std;
static list<string> foo;
static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
static unsigned max_size = 10;
#if defined(__CYGWIN__)
static int iters = 10000;
#else
static int iters = 300000;
#endif
void*
produce (void*)
{
for (int num = 0; num < iters; )
{
string str ("test string");
pthread_mutex_lock (&fooLock);
while (foo.size () >= max_size)
pthread_cond_wait (&fooCondOverflow, &fooLock);
foo.push_back (str);
num++;
if (foo.size () >= (max_size / 2))
pthread_cond_signal (&fooCondUnderflow);
pthread_mutex_unlock (&fooLock);
}
pthread_mutex_lock (&fooLock);
pthread_cond_signal (&fooCondUnderflow);
pthread_mutex_unlock (&fooLock);
return 0;
}
void*
consume (void*)
{
for (int num = 0; num < iters; )
{
pthread_mutex_lock (&fooLock);
while (foo.size () == 0)
pthread_cond_wait (&fooCondUnderflow, &fooLock);
while (foo.size () > 0)
{
string str = foo.back ();
foo.pop_back ();
num++;
}
pthread_cond_signal (&fooCondOverflow);
pthread_mutex_unlock (&fooLock);
}
return 0;
}
#if !__GXX_WEAK__ && _MT_ALLOCATOR_H
template class __gnu_cxx::__mt_alloc<std::string>;
template class __gnu_cxx::__mt_alloc<std::_List_node<std::string> >;
#endif
int
main (void)
{
#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
pthread_setconcurrency (2);
#endif
pthread_t prod;
pthread_create (&prod, NULL, produce, NULL);
pthread_t cons;
pthread_create (&cons, NULL, consume, NULL);
pthread_join (prod, NULL);
pthread_join (cons, NULL);
return 0;
}