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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [coresem.c] - Rev 30
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/* * CORE Semaphore Handler * * DESCRIPTION: * * This package is the implementation of the CORE Semaphore Handler. * This core object utilizes standard Dijkstra counting semaphores to provide * synchronization and mutual exclusion capabilities. * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: coresem.c,v 1.2 2001-09-27 11:59:34 chris Exp $ */ #include <rtems/system.h> #include <rtems/score/isr.h> #include <rtems/score/coresem.h> #include <rtems/score/states.h> #include <rtems/score/thread.h> #include <rtems/score/threadq.h> #if defined(RTEMS_MULTIPROCESSING) #include <rtems/score/mpci.h> #endif /*PAGE * * CORE_semaphore_Initialize * * This function initialize a semaphore and sets the initial value based * on the given count. * * Input parameters: * the_semaphore - the semaphore control block to initialize * the_class - the API class of the object * the_semaphore_attributes - the attributes specified at create time * initial_value - semaphore's initial value * proxy_extract_callout - MP specific extract callout * * Output parameters: NONE */ void _CORE_semaphore_Initialize( CORE_semaphore_Control *the_semaphore, Objects_Classes the_class, CORE_semaphore_Attributes *the_semaphore_attributes, unsigned32 initial_value, Thread_queue_Extract_callout proxy_extract_callout ) { the_semaphore->Attributes = *the_semaphore_attributes; the_semaphore->count = initial_value; _Thread_queue_Initialize( &the_semaphore->Wait_queue, the_class, _CORE_semaphore_Is_priority( the_semaphore_attributes ) ? THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO, STATES_WAITING_FOR_SEMAPHORE, proxy_extract_callout, CORE_SEMAPHORE_TIMEOUT ); }
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