forked from Qortal/Brooklyn
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
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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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#ifndef MMAL_VC_SHM_H
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#define MMAL_VC_SHM_H
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/** @file
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*
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* Abstraction layer for MMAL VC shared memory.
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* This API is only used by the MMAL VC component.
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*/
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#include "mmal_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Initialise the shared memory system */
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MMAL_STATUS_T mmal_vc_shm_init(void);
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/** Release the shared memory system */
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void mmal_vc_shm_exit(void);
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/** Allocate a shared memory buffer */
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uint8_t *mmal_vc_shm_alloc(uint32_t size);
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/** Free a shared memory buffer */
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MMAL_STATUS_T mmal_vc_shm_free(uint8_t *mem);
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/** Lock a shared memory buffer */
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uint8_t *mmal_vc_shm_lock(uint8_t *mem, uint32_t workaround);
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/** Unlock a shared memory buffer */
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uint8_t *mmal_vc_shm_unlock(uint8_t *mem, uint32_t *length, uint32_t workaround);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MMAL_VC_SHM_H */
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