diff options
Diffstat (limited to 'cpukit/libcsupport/src/posix_memalign.c')
-rw-r--r-- | cpukit/libcsupport/src/posix_memalign.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/posix_memalign.c b/cpukit/libcsupport/src/posix_memalign.c new file mode 100644 index 0000000000..c3dae3449e --- /dev/null +++ b/cpukit/libcsupport/src/posix_memalign.c @@ -0,0 +1,102 @@ +/* + * posix_memalign() + * + * COPYRIGHT (c) 1989-2007. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef RTEMS_NEWLIB +#include "malloc_p.h" + +#include <stdlib.h> +#include <errno.h> + +int posix_memalign( + void **pointer, + size_t alignment, + size_t size +) +{ + void *return_this; + + /* + * Update call statistics + */ + MSBUMP(memalign_calls, 1); + + /* + * Parameter error checks + */ + if ( !pointer ) + return EINVAL; + + *pointer = NULL; + + if (((alignment - 1) & alignment) != 0 || (alignment < sizeof(void *))) + return EINVAL; + + if ( !size ) + return EINVAL; + + /* + * Do not attempt to allocate memory if not in correct system state. + */ + if ( _System_state_Is_up(_System_state_Get()) && + !malloc_is_system_state_OK() ) + return EINVAL; + + /* + * + * If some free's have been deferred, then do them now. + */ + malloc_process_deferred_frees(); + + #if defined(RTEMS_MALLOC_BOUNDARY_HELPERS) + /* + * If the support for a boundary area at the end of the heap + * block allocated is turned on, then adjust the size. + */ + if (rtems_malloc_boundary_helpers) + size += (*rtems_malloc_boundary_helpers->overhead)(); + #endif + + /* + * Perform the aligned allocation requested + */ + + return_this = _Protected_heap_Allocate_aligned( + &RTEMS_Malloc_Heap, + size, + alignment + ); + if ( !return_this ) + return ENOMEM; + + /* + * If configured, update the more involved statistics + */ + if ( rtems_malloc_statistics_helpers ) + (*rtems_malloc_statistics_helpers->at_malloc)(pointer); + + #if defined(RTEMS_MALLOC_BOUNDARY_HELPERS) + /* + * If configured, set the boundary area + */ + if (rtems_malloc_boundary_helpers) + (*rtems_malloc_boundary_helpers->at_malloc)(return_this, size); + #endif + + *pointer = return_this; + return 0; +} +#endif |