mirror of https://github.com/ARMmbed/mbed-os.git
125 lines
4.7 KiB
C++
125 lines
4.7 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2017 ARM Limited
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef EVENT_FLAG_H
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#define EVENT_FLAG_H
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#include <stdint.h>
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#include "cmsis_os2.h"
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#include "mbed_rtos1_types.h"
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#include "mbed_rtos_storage.h"
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#include "platform/NonCopyable.h"
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namespace rtos {
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/** \addtogroup rtos */
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/** @{*/
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/**
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* \defgroup rtos_EventFlags EventFlags class
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* @{
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*/
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/** The EventFlags class is used to signal or wait for an arbitrary event or events.
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@note
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EventFlags support 31 flags so the MSB flag is ignored, it is used to return an error code (@a osFlagsError)
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@note
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Memory considerations: The EventFlags control structures will be created on current thread's stack, both for the mbed OS
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and underlying RTOS objects (static or dynamic RTOS memory pools are not being used).
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*/
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class EventFlags : private mbed::NonCopyable<EventFlags> {
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public:
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/** Create and Initialize an EventFlags object
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*
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* @note You cannot call this function from ISR context.
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*/
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EventFlags();
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/** Create and Initialize a EventFlags object
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@param name name to be used for this EventFlags. It has to stay allocated for the lifetime of the thread.
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@note You cannot call this function from ISR context.
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*/
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EventFlags(const char *name);
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/** Set the specified Event Flags.
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@param flags specifies the flags that shall be set.
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@return event flags after setting or error code if highest bit set (@a osFlagsError).
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@note This function may be called from ISR context.
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*/
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uint32_t set(uint32_t flags);
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/** Clear the specified Event Flags.
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@param flags specifies the flags that shall be cleared. (default: 0x7fffffff - all flags)
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@return event flags before clearing or error code if highest bit set (@a osFlagsError).
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@note You may call this function from ISR context.
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*/
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uint32_t clear(uint32_t flags = 0x7fffffff);
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/** Get the currently set Event Flags.
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@return set event flags.
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@note You may call this function from ISR context.
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*/
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uint32_t get() const;
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/** Wait for all of the specified event flags to become signaled.
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@param flags specifies the flags to wait for.
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@param timeout timeout value or 0 in case of no time-out. (default: osWaitForever)
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@param clear specifies wether to clear the flags after waiting for them. (default: true)
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@return event flags before clearing or error code if highest bit set (@a osFlagsError).
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@note You may call this function from ISR context if the timeout parameter is set to 0.
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*/
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uint32_t wait_all(uint32_t flags = 0, uint32_t timeout = osWaitForever, bool clear = true);
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/** Wait for any of the specified event flags to become signaled.
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@param flags specifies the flags to wait for. (default: 0)
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@param timeout timeout value or 0 in case of no time-out. (default: osWaitForever)
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@param clear specifies wether to clear the flags after waiting for them. (default: true)
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@return event flags before clearing or error code if highest bit set (@a osFlagsError).
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@note This function may be called from ISR context if the timeout parameter is set to 0.
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*/
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uint32_t wait_any(uint32_t flags = 0, uint32_t timeout = osWaitForever, bool clear = true);
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/** Event flags destructor
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@note You cannot call this function from ISR context.
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*/
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~EventFlags();
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private:
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void constructor(const char *name = NULL);
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uint32_t wait(uint32_t flags, uint32_t opt, uint32_t timeout, bool clear);
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osEventFlagsId_t _id;
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mbed_rtos_storage_event_flags_t _obj_mem;
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};
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/** @}*/
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/** @}*/
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}
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#endif
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