Clone of mbed rtos 2 for easy accessibility.
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Diff: rtx/TARGET_CORTEX_M/rt_OsEventObserver.c
- Revision:
- 118:6635230e06ba
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rtx/TARGET_CORTEX_M/rt_OsEventObserver.c Mon Jul 25 14:12:24 2016 +0100 @@ -0,0 +1,61 @@ +/*---------------------------------------------------------------------------- + * CMSIS-RTOS - RTX + *---------------------------------------------------------------------------- + * Name: rt_OsEventObserver.c + * Purpose: OS Event Callbacks for CMSIS RTOS + * Rev.: VX.XX + *---------------------------------------------------------------------------- + * + * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH + * All rights reserved. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + *---------------------------------------------------------------------------*/ + +#include "rt_OsEventObserver.h" + +/* + * _____ _____ ____ __ _____ + * | ___|_ _\ \/ / \/ | ____| + * | |_ | | \ /| |\/| | _| + * | _| | | / \| | | | |___ + * |_| |___/_/\_\_| |_|_____| + * + * FIXME: + * The osEventObs variable must be in protected memory. If not every box + * and box 0 can modify osEventObs to point to any handler to run code + * privileged. This issue is tracked at + * <https://github.com/ARMmbed/uvisor/issues/235>. + */ +const OsEventObserver *osEventObs; + +void osRegisterForOsEvents(const OsEventObserver *observer) +{ + static uint8_t has_been_called = 0; + if (has_been_called) { + return; + } + has_been_called = 1; + + osEventObs = observer; +}