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author | Gedare Bloom <gedare@rtems.org> | 2016-08-12 15:25:10 -0400 |
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committer | Gedare Bloom <gedare@rtems.org> | 2017-01-13 11:17:30 -0500 |
commit | ba77628250ae7158db363fc0d7886ebd43e9cb69 (patch) | |
tree | 91a8a5b7d20399c69c5c88223a43ec681451996b /cpukit/posix/include/rtems/posix/shmimpl.h | |
parent | posix: fix typo in mmap arguments (diff) | |
download | rtems-ba77628250ae7158db363fc0d7886ebd43e9cb69.tar.bz2 |
posix: shared memory support
Add POSIX shared memory manager (Shm). Includes a hook-based
approach for the backing memory storage that defaults to the
Workspace, and a test is provided using the heap. A test is
also provided for the basic use of mmap'ing a shared memory
object. This test currently fails at the mmap stage due to
no support for mmap.
Diffstat (limited to '')
-rw-r--r-- | cpukit/posix/include/rtems/posix/shmimpl.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/cpukit/posix/include/rtems/posix/shmimpl.h b/cpukit/posix/include/rtems/posix/shmimpl.h new file mode 100644 index 0000000000..207f50fc95 --- /dev/null +++ b/cpukit/posix/include/rtems/posix/shmimpl.h @@ -0,0 +1,115 @@ +/** + * @file + * + * @brief Private Support Information for POSIX Shared Memory + * + */ + +/* + * Copyright (c) 2016 Gedare Bloom. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef _RTEMS_POSIX_SHMIMPL_H +#define _RTEMS_POSIX_SHMIMPL_H + +#include <rtems/fs.h> +#include <rtems/libio.h> +#include <rtems/posix/posixapi.h> +#include <rtems/posix/shm.h> +#include <rtems/score/objectimpl.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @ingroup POSIXShmPrivate + * @{ + */ + +extern Objects_Information _POSIX_Shm_Information; + +RTEMS_INLINE_ROUTINE void _POSIX_Shm_Acquire( + POSIX_Shm_Control *the_shm, + Thread_queue_Context *queue_context +) +{ + _Thread_queue_Acquire( + &the_shm->Wait_queue, + queue_context + ); +} + +RTEMS_INLINE_ROUTINE void _POSIX_Shm_Release( + POSIX_Shm_Control *the_shm, + Thread_queue_Context *queue_context +) +{ + _Thread_queue_Release( &the_shm->Wait_queue, queue_context ); +} + +RTEMS_INLINE_ROUTINE POSIX_Shm_Control *_POSIX_Shm_Allocate_unprotected( void ) +{ + return (POSIX_Shm_Control *) + _Objects_Allocate_unprotected( &_POSIX_Shm_Information ); +} + +/** + * @brief POSIX Shared Memory Free + * + * This routine frees a shm control block. + */ +RTEMS_INLINE_ROUTINE void _POSIX_Shm_Free ( + POSIX_Shm_Control *the_shm +) +{ + _Objects_Free( &_POSIX_Shm_Information, &the_shm->Object ); +} + +RTEMS_INLINE_ROUTINE POSIX_Shm_Control *_POSIX_Shm_Get_by_name( + const char *name, + size_t *name_length_p, + Objects_Get_by_name_error *error +) +{ + return (POSIX_Shm_Control *) _Objects_Get_by_name( + &_POSIX_Shm_Information, + name, + name_length_p, + error + ); +} + +RTEMS_INLINE_ROUTINE void _POSIX_Shm_Update_mtime_ctime( + POSIX_Shm_Control *shm +) +{ + struct timeval now; + gettimeofday( &now, 0 ); + shm->mtime = now.tv_sec; + shm->ctime = now.tv_sec; +} + +static inline POSIX_Shm_Control* iop_to_shm( rtems_libio_t *iop ) +{ + return (POSIX_Shm_Control*) iop->data1; +} + +static inline POSIX_Shm_Control* loc_to_shm( + const rtems_filesystem_location_info_t *loc +) +{ + return (POSIX_Shm_Control*) loc->node_access; +} + +/** @} */ + +#ifdef __cplusplus +} +#endif + +#endif |