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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [librtems++/] [src/] [rtemsInterrupt.cc] - Rev 587
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/* ------------------------------------------------------------------------ $Id: rtemsInterrupt.cc,v 1.2 2001-09-27 12:02:05 chris Exp $ ------------------------------------------------------------------------ COPYRIGHT (c) 1997 Objective Design Systems Ltd Pty (ODS) All rights reserved (R) Objective Design Systems Ltd Pty 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. ------------------------------------------------------------------------ See header file. ------------------------------------------------------------------------ */ #include <rtems++/rtemsInterrupt.h> /* ---- Interrupt Table This table is used to re-direct the call from RTEMS to a user object */ static rtemsInterrupt *interrupt_table[CPU_INTERRUPT_NUMBER_OF_VECTORS]; // has the table been initialised static bool initialised = false; /* ---- rtemsInterrupt */ rtemsInterrupt::rtemsInterrupt() : vector(0), caught(false), old_handler(0), old_interrupt(0) { if (!initialised) { for (rtems_vector_number vec = 0; vec < CPU_INTERRUPT_NUMBER_OF_VECTORS; vec++) { interrupt_table[vector] = 0; } initialised = true; } } rtemsInterrupt::~rtemsInterrupt() { release(); } const rtems_status_code rtemsInterrupt::isr_catch(const rtems_vector_number vec) { if (vec >= CPU_INTERRUPT_NUMBER_OF_VECTORS) return set_status_code(RTEMS_INVALID_NUMBER); if (caught) return set_status_code(RTEMS_RESOURCE_IN_USE); old_interrupt = interrupt_table[vector]; interrupt_table[vector] = this; vector = vec; set_status_code(rtems_interrupt_catch(redirector, vector, &old_handler)); if (successful()) caught = true; else { interrupt_table[vector] = old_interrupt; old_interrupt = 0; old_handler = 0; vector = 0; } return last_status_code(); } const rtems_status_code rtemsInterrupt::release(void) { if (caught) { set_status_code(rtems_interrupt_catch(old_handler, vector, &old_handler)); interrupt_table[vector] = old_interrupt; old_interrupt = 0; old_handler = 0; vector = 0; caught = false; } else set_status_code(RTEMS_SUCCESSFUL); return last_status_code(); } void rtemsInterrupt::redirector(rtems_vector_number vector) { if (interrupt_table[vector]) interrupt_table[vector]->handler(); }
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