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119 lines
4.0 KiB
119 lines
4.0 KiB
3 years ago
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/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*=============================================================================
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VideoCore OS Abstraction Layer - public header file
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=============================================================================*/
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#ifndef VCOS_EVENT_FLAGS_H
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#define VCOS_EVENT_FLAGS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "interface/vcos/vcos_types.h"
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#include "vcos.h"
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#define VCOS_EVENT_FLAGS_SUSPEND VCOS_SUSPEND
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#define VCOS_EVENT_FLAGS_NO_SUSPEND VCOS_NO_SUSPEND
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typedef VCOS_OPTION VCOS_EVENTGROUP_OPERATION_T;
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/**
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* \file vcos_event_flags.h
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*
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* Defines event flags API.
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*
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* Similar to Nucleus event groups.
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*
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* These have the same semantics as Nucleus event groups and ThreadX event
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* flags. As such, they are quite complex internally; if speed is important
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* they might not be your best choice.
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*
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*/
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/**
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* Create an event flags instance.
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*
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* @param flags Pointer to event flags instance, filled in on return.
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* @param name Name for the event flags, used for debug.
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*
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* @return VCOS_SUCCESS if succeeded.
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*/
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VCOS_INLINE_DECL
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VCOS_STATUS_T vcos_event_flags_create(VCOS_EVENT_FLAGS_T *flags, const char *name);
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/**
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* Set some events.
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*
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* @param flags Instance to set flags on
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* @param events Bitmask of the flags to actually set
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* @param op How the flags should be set. VCOS_OR will OR in the flags; VCOS_AND
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* will AND them in, possibly clearing existing flags.
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*/
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VCOS_INLINE_DECL
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void vcos_event_flags_set(VCOS_EVENT_FLAGS_T *flags,
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VCOS_UNSIGNED events,
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VCOS_OPTION op);
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/**
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* Retrieve some events.
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*
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* Waits until the specified events have been set.
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*
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* @param flags Instance to wait on
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* @param requested_events The bitmask to wait for
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* @param op VCOS_OR - get any; VCOS_AND - get all.
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* @param ms_suspend How long to wait, in milliseconds
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* @param retrieved_events the events actually retrieved.
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*
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* @return VCOS_SUCCESS if events were retrieved. VCOS_EAGAIN if the
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* timeout expired.
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*/
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VCOS_INLINE_DECL
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VCOS_STATUS_T vcos_event_flags_get(VCOS_EVENT_FLAGS_T *flags,
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VCOS_UNSIGNED requested_events,
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VCOS_OPTION op,
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VCOS_UNSIGNED ms_suspend,
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VCOS_UNSIGNED *retrieved_events);
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/**
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* Delete an event flags instance.
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*/
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VCOS_INLINE_DECL
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void vcos_event_flags_delete(VCOS_EVENT_FLAGS_T *);
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#ifdef __cplusplus
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}
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#endif
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#endif
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