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#ifndef POOL_CPP
#define POOL_CPP
#include "pool.h"
using namespace std;
pool::pool()
{
pthread_mutex_init(&mut_threads, 0);
pthread_mutex_init(&mut_queue_tasks, 0);
pthread_mutex_init(&mut_num_avail_threads, 0);
pthread_cond_init(&cond_new_task, 0);
i_num_total_threads = 0;
i_num_avail_threads = s_tool::string2int( s_conf::get
().get_val( "THRDPOOL" ) );
increase_pool(i_num_avail_threads);
}
pool::~pool()
{
pthread_mutex_lock(&mut_queue_tasks);
while (!queue_tasks.empty())
{
delete queue_tasks.front();
queue_tasks.pop();
}
pthread_mutex_unlock(&mut_queue_tasks);
pthread_mutex_destroy(&mut_threads);
pthread_mutex_destroy(&mut_queue_tasks);
pthread_mutex_destroy(&mut_num_avail_threads);
pthread_cond_destroy(&cond_new_task);
}
int
pool::increase_pool(int i_num)
{
#ifdef VERBOSE
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
cout << POOLFLL + s_tool::int2string(i_num) +","+s_tool::int2string(i_num_total_threads)+")" << endl;
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
#endif
int i_max_pool_size = s_tool::string2int( s_conf::get
().get_val( "THRDPMAX" ) );
for ( int i = 0; i < i_num; ++i )
{
if ( i_max_pool_size != 0 && i_num_total_threads >= i_max_pool_size )
{
#ifdef VERBOSE
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
cout << POOLER2+s_tool::int2string(i_max_pool_size)+")" << endl;
cout << POOLER1+s_tool::int2string(i)+")" << endl;
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
#endif
return i;
}
++i_num_total_threads;
pthread_t p_pthread;
pthread_create(&p_pthread, 0, wait_for_task, (void*) this );
}
return i_num;
}
void
pool::add_task( void(*p_func)(void*), void* p_void )
{
pthread_mutex_lock(&mut_queue_tasks);
queue_tasks.push(new task(p_func, p_void));
pthread_mutex_unlock(&mut_queue_tasks);
pthread_cond_signal(&cond_new_task);
}
void*
pool::wait_for_task( void* p_void )
{
pool* p_pool = static_cast<pool*>(p_void);
for (;;)
{
pthread_mutex_lock(&p_pool->mut_threads);
pthread_cond_wait(&p_pool->cond_new_task, &p_pool->mut_threads);
pthread_mutex_lock(&p_pool->mut_num_avail_threads);
if ( --p_pool->i_num_avail_threads < 5 )
{
int i_size = 9 - p_pool->i_num_avail_threads;
i_size = p_pool->increase_pool(i_size);
p_pool->i_num_avail_threads += i_size;
}
pthread_mutex_unlock(&p_pool->mut_num_avail_threads);
pthread_mutex_lock(&p_pool->mut_queue_tasks);
task* p_task = p_pool->queue_tasks.front();
p_pool->queue_tasks.pop();
pthread_mutex_unlock(&p_pool->mut_queue_tasks);
pthread_mutex_unlock(&p_pool->mut_threads);
(*(p_task->p_func))(p_task->p_void);
delete p_task;
pthread_mutex_lock(&p_pool->mut_num_avail_threads);
p_pool->i_num_avail_threads++;
pthread_mutex_unlock(&p_pool->mut_num_avail_threads);
}
return 0;
}
void
pool::run(void* p_void)
{
add_task(run_func, p_void);
}
void
pool::run_func(void *p_void)
{
#ifdef VERBOSE
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
cout << THREADS << endl;
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
#endif
// recasting the client thread object.
thrd *t = (thrd*) p_void;
// start parsing the client request and sending response's back.
t-> run ();
// close the client socket.
t->~thrd();
free(p_void);
#ifdef VERBOSE
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
cout << THREADE << endl;
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
#endif
}
bool
pool::allow_user_login()
{
pthread_mutex_lock(&mut_num_avail_threads);
if ( i_num_avail_threads < 2 )
{
int i_max_pool_size = s_tool::string2int( s_conf::get
().get_val( "THRDPMAX" ) );
if ( i_max_pool_size != 0 && i_max_pool_size == i_num_total_threads )
{
pthread_mutex_unlock(&mut_num_avail_threads);
return false;
}
}
pthread_mutex_unlock(&mut_num_avail_threads);
return true;
}
#endif
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