void *malloc(
size_t size
)
{
void *return_this;
MSBUMP(malloc_calls, 1);
/*
* If some free's have been deferred, then do them now.
*/
malloc_deferred_frees_process();
/*
* Validate the parameters
*/
if ( !size )
return (void *) 0;
/*
* 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 NULL;
/*
* Try to give a segment in the current heap if there is not
* enough space then try to grow the heap.
* If this fails then return a NULL pointer.
*/
return_this = _Protected_heap_Allocate( RTEMS_Malloc_Heap, size );
if ( !return_this ) {
return_this = (*rtems_malloc_extend_handler)( RTEMS_Malloc_Heap, size );
if ( !return_this ) {
errno = ENOMEM;
return (void *) 0;
}
}
/*
* If the user wants us to dirty the allocated memory, then do it.
*/
if ( rtems_malloc_dirty_helper )
(*rtems_malloc_dirty_helper)( return_this, size );
/*
* If configured, update the statistics
*/
if ( rtems_malloc_statistics_helpers )
(*rtems_malloc_statistics_helpers->at_malloc)(return_this);
return return_this;
}
int rtems_memalign(
void **pointer,
size_t alignment,
size_t size
)
{
void *return_this;
/*
* Parameter error checks
*/
if ( !pointer )
return EINVAL;
*pointer = NULL;
/*
* 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_deferred_frees_process();
/*
* 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);
*pointer = return_this;
return 0;
}
int rtems_memalign(
void **pointer,
size_t alignment,
size_t size
)
{
void *return_this;
/*
* Parameter error checks
*/
if ( !pointer )
return EINVAL;
*pointer = NULL;
/*
* Do not attempt to allocate memory if not in correct system state.
*/
if ( !malloc_is_system_state_OK() )
return EINVAL;
/*
* If some free's have been deferred, then do them now.
*/
malloc_deferred_frees_process();
/*
* Perform the aligned allocation requested
*/
return_this = _Protected_heap_Allocate_aligned(
RTEMS_Malloc_Heap,
size,
alignment
);
if ( !return_this )
return ENOMEM;
*pointer = return_this;
return 0;
}
void *malloc(
size_t size
)
{
void *return_this;
MSBUMP(malloc_calls, 1);
/*
* If some free's have been deferred, then do them now.
*/
malloc_deferred_frees_process();
/*
* Validate the parameters
*/
if ( !size )
return (void *) 0;
/*
* 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 NULL;
/*
* Walk the heap and verify its integrity
*/
#if defined(RTEMS_HEAP_DEBUG)
_Protected_heap_Walk( RTEMS_Malloc_Heap, 0, false );
#endif
#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
/*
* Try to give a segment in the current heap if there is not
* enough space then try to grow the heap.
* If this fails then return a NULL pointer.
*/
return_this = _Protected_heap_Allocate( RTEMS_Malloc_Heap, size );
if ( !return_this ) {
if (rtems_malloc_sbrk_helpers)
return_this = (*rtems_malloc_sbrk_helpers->extend)( size );
if ( !return_this ) {
errno = ENOMEM;
return (void *) 0;
}
}
/*
* If the user wants us to dirty the allocated memory, then do it.
*/
if ( rtems_malloc_dirty_helper )
(*rtems_malloc_dirty_helper)( return_this, size );
/*
* If configured, update the statistics
*/
if ( rtems_malloc_statistics_helpers )
(*rtems_malloc_statistics_helpers->at_malloc)(return_this);
#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
return return_this;
}
