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#ifndef POOL_CPP
#define POOL_CPP
#include "pool.h"
using namespace std;
int pool::i_thrd_used = 0;
pool::pool()
{
i_thrd_pool_size = tool::string2int( wrap::CONF->get_elem( "httpd.thread.initpoolsize" ) );
i_thrd_pool_queue = tool::string2int( wrap::CONF->get_elem( "httpd.thread.queuesize" ) );
tpool_init( &thread_pool, i_thrd_pool_size, i_thrd_pool_queue);
}
void
pool::tpool_init( tpool_t *tpoolp, int num_worker_threads, int max_queue_size)
{
int i, rtn;
tpool_t tpool;
// allocate a pool data structure
if (( tpool = (tpool_t) malloc( sizeof( struct tpool ) ) ) == 0 )
{
wrap::system_message( POOLERR );
exit(-1);
}
// initialize th fields
tpool->num_threads = num_worker_threads;
tpool->max_queue_size = max_queue_size;
if ( ( tpool->threads = (pthread_t*) malloc( sizeof(pthread_t)*num_worker_threads ) ) == 0 )
{
wrap::system_message( POOLERR );
exit(-1);
}
tpool->cur_queue_size = 0;
tpool->queue_head = 0;
tpool->queue_tail = 0;
if ( ( rtn = pthread_mutex_init( &(tpool->queue_lock), 0 ) ) != 0 )
{
string s_err( "pthread_mutex_init " );
s_err.append( strerror( rtn ) );
wrap::system_message( s_err );
exit(-1);
}
else if ( ( rtn = pthread_cond_init( &(tpool->queue_not_empty), 0 ) ) != 0 )
{
string s_err( "pthread_cond_init (1): " );
s_err.append( strerror( rtn ) );
wrap::system_message( s_err );
exit(1);
}
else if ( ( rtn = pthread_cond_init( &(tpool->queue_not_full), 0 ) ) != 0 )
{
string s_err( "pthread_cond_init (2): " );
s_err.append( strerror( rtn ) );
wrap::system_message( s_err );
exit(1);
}
else if ( ( rtn = pthread_cond_init( &(tpool->queue_empty), 0 ) ) != 0 )
{
string s_err( "pthread_mutex_init " );
s_err.append( strerror( rtn ) );
wrap::system_message( s_err );
exit(1);
}
// create threads
for ( i = 0; i < num_worker_threads; i++ )
pthread_create( &(tpool->threads[i]) , 0, tpool_thread, (void*)tpool );
*tpoolp = tpool;
}
void*
pool::tpool_thread( void* p_void )
{
tpool_t tpool = (tpool_t) p_void;
tpool_work_t *my_workp;
for( ;; )
{
pthread_mutex_lock( &(tpool->queue_lock) );
while ( tpool->cur_queue_size == 0)
pthread_cond_wait( &(tpool->queue_not_empty), &(tpool->queue_lock) );
my_workp = tpool->queue_head;
tpool->cur_queue_size--;
if ( tpool->cur_queue_size == 0)
tpool->queue_head = tpool->queue_tail = 0;
else
tpool->queue_head = my_workp->next;
if ( tpool->cur_queue_size == ( tpool->max_queue_size - 1 ) )
pthread_cond_signal( &(tpool->queue_not_full) );
if ( tpool->cur_queue_size == 0 )
pthread_cond_signal( &(tpool->queue_empty) );
pthread_mutex_unlock( &(tpool->queue_lock) );
(*(my_workp->routine))(my_workp->p_void);
pthread_mutex_lock( &(tpool->queue_lock) );
--i_thrd_used;
#ifdef NCURSES
print_threads(i_thrd_used);
#endif
pthread_mutex_unlock( &(tpool->queue_lock) );
//free( (void*) my_workp );
free( my_workp );
}
}
void pool::run_func( void *p_void )
{
int* p_sock = (int*)p_void;
wrap::SOCK->read_write( p_sock );
delete p_sock;
}
int
pool::tpool_add_work( tpool_t tpool, void(*routine)(void*), void* p_void ) ///
{
tpool_work_t *workp;
pthread_mutex_lock( &(tpool->queue_lock) );
if ( ++i_thrd_used == tpool->num_threads )
{
int i_max_pool_size = tool::string2int( wrap::CONF->get_elem( "httpd.thread.maxpoolsize" ) );
if ( i_max_pool_size != 0 && i_thrd_used > i_max_pool_size )
{
wrap::system_message(POOLER2+tool::int2string(i_thrd_used)+")");
}
else
{
int i_size = tpool->num_threads * 2;
wrap::system_message(POOLFLL+tool::int2string(i_size)+")");
tpool->threads = (pthread_t*)realloc((void*)tpool->threads, sizeof(pthread_t)*tpool->num_threads);
for ( int i = tpool->num_threads; i < i_size; ++i )
pthread_create( &(tpool->threads[i]) , 0, tpool_thread, (void*)tpool );
i_thrd_pool_size = tpool->num_threads = i_size;
#ifdef NCURSES
print_pool_size();
#endif
}
}
#ifdef NCURSES
print_threads(i_thrd_used);
#endif
while (tpool->cur_queue_size == tpool->max_queue_size)
pthread_cond_wait( &(tpool->queue_not_full), &(tpool->queue_lock) );
// allocate work structure:
workp = (tpool_work_t*) malloc( sizeof( tpool_work_t ) );
workp->routine = routine;
workp->p_void = p_void;
workp->next = 0;
if (tpool->cur_queue_size == 0 )
{
tpool->queue_tail = tpool->queue_head = workp;
}
else
{
(tpool->queue_tail)->next = workp;
tpool->queue_tail = workp;
}
pthread_cond_signal( &tpool->queue_not_empty );
tpool->cur_queue_size++;
pthread_mutex_unlock( &(tpool->queue_lock) );
return 0;
}
#ifdef NCURSES
void
pool::print_threads(int i_thrd_used)
{
if ( wrap::NCUR->is_ready() )
{
mvprintw( NCUR_POOL_RUNNING_X,NCUR_POOL_RUNNING_Y, "In use: %d ", i_thrd_used);
refresh();
}
}
void
pool::print_pool_size()
{
if ( wrap::NCUR->is_ready() )
{
mvprintw( NCUR_POOL_SIZE_X,NCUR_POOL_SIZE_Y, "Size: %d %d", i_thrd_pool_size, i_thrd_pool_queue );
refresh();
}
}
#endif
#endif
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