tagging tags

1 files changed, 206 insertions, 0 deletions

diff --git a/yhttpd-0.7.0/src/thrd/pool.cpp b/yhttpd-0.7.0/src/thrd/pool.cpp
new file mode 100755
index 0000000..1db639d
--- /dev/null
+++ b/yhttpd-0.7.0/src/thrd/pool.cpp
@@ -0,0 +1,206 @@
+#ifndef POOL_CPP
+#define POOL_CPP
+
+#include "pool.h"
+#include "thrd.h"
+
+using namespace std;
+
+pool::pool()
+{
+    i_thrd_pool_size  = tool::string2int( wrap::CONF->get_elem( "httpd.thread.poolsize" ) );
+    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, 0 );
+}
+
+void
+pool::tpool_init( tpool_t *tpoolp, int num_worker_threads, int max_queue_size, int do_not_block_when_full )
+{
+    int i, rtn;
+    tpool_t tpool;
+
+    // allocate a pool data structure
+    if (( tpool = (tpool_t) malloc( sizeof( struct tpool ) ) ) == NULL )
+    {
+     wrap::system_message( POOLERR );
+     exit(-1);
+    }
+
+    // initialize th fields
+    tpool->num_threads    = num_worker_threads;
+    tpool->max_queue_size = max_queue_size;
+    tpool->do_not_block_when_full = do_not_block_when_full;
+
+    if ( ( tpool->threads = (pthread_t*) malloc( sizeof( pthread_t ) *num_worker_threads ) ) == NULL )
+    {
+        wrap::system_message( POOLERR );
+        exit(-1);
+    }
+
+    tpool->cur_queue_size = 0;
+    tpool->queue_head     = NULL;
+    tpool->queue_tail     = NULL;
+    tpool->queue_closed   = 0;
+    tpool->shutdown       = 0;
+
+    if ( ( rtn = pthread_mutex_init( &(tpool->queue_lock), NULL ) ) != 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), NULL ) ) != 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_full), NULL ) ) != 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_empty), NULL ) ) != 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]) , NULL, tpool_thread, (void*)tpool );
+
+    *tpoolp = tpool;
+}
+
+void*
+pool::tpool_thread( void* arg )
+{
+    tpool_t tpool = (tpool_t) arg;
+    tpool_work_t *my_workp;
+
+    while( true )
+    {
+        pthread_mutex_lock( &(tpool->queue_lock) );
+
+        while ( (tpool->cur_queue_size == 0) && (!tpool->shutdown) )
+            pthread_cond_wait( &(tpool->queue_not_empty), &(tpool->queue_lock) );
+
+        if (tpool->shutdown)
+        {
+            pthread_mutex_unlock( &(tpool->queue_lock) );
+            pthread_exit( NULL );
+        }
+
+        my_workp = tpool->queue_head;
+        tpool->cur_queue_size--;
+
+        if ( tpool->cur_queue_size == 0)
+            tpool->queue_head = tpool->queue_tail = NULL;
+
+        else
+            tpool->queue_head = my_workp->next;
+
+        if ( ( ! tpool->do_not_block_when_full ) &&
+                (   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->arg);
+        free((void*)my_workp);
+    }
+}
+
+void pool::run_func( void *v_pointer )
+{
+    wrap::SOCK->increase_num_threads();
+
+    // recasting the client thread object.
+    thrd *t = (thrd*) v_pointer;
+
+    // start parsing the client request and sending response's back.
+    t-> run ();
+
+    // close the client socket.
+    t->~thrd();
+
+    wrap::SOCK->decrease_num_threads();
+
+    free(v_pointer);
+}
+
+int
+pool::tpool_add_work( tpool_t tpool, void(*routine)(void*), void* arg ) ///
+{
+    tpool_work_t *workp;
+    pthread_mutex_lock( &(tpool->queue_lock) );
+
+    if( ( tpool->cur_queue_size == tpool->max_queue_size ) &&
+            tpool->do_not_block_when_full )
+    {
+        pthread_mutex_unlock( &(tpool->queue_lock) );
+        return -1;
+    }
+
+    while( (     tpool->cur_queue_size == tpool->max_queue_size ) &&
+            ( ! ( tpool->shutdown       || tpool->queue_closed   ) ) )
+        pthread_cond_wait( &(tpool->queue_not_full), &(tpool->queue_lock) );
+
+    if( tpool->shutdown || tpool->queue_closed )
+    {
+        pthread_mutex_unlock( &tpool->queue_lock );
+        return -1;
+    }
+
+    // allocate work structure:
+    workp = (tpool_work_t*) malloc( sizeof( tpool_work_t ) );
+
+    workp->routine = routine;
+    workp->arg     = arg;
+    workp->next    = NULL;
+
+    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 1;
+}
+
+#ifdef NCURSES
+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