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2007-05-03 Joel Sherrill <joel@OARcorp.com>

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* ChangeLog, libcsupport/src/malloc.c,
	libcsupport/src/mallocfreespace.c, sapi/include/confdefs.h,
	score/Makefile.am, score/preinstall.am: malloc never blocks so the
	Region Manager is quite heavy for implementing this. This patch
	implements the C Program Heap directly in terms of the new Protected
	Heap handler. This handler is a direct use of a SuperCore Heap in
	conjunction with the Allocator Mutex used internally by RTEMS. This
	saves 3184 bytes on most SPARC test executables.
	* score/include/rtems/score/protectedheap.h, score/src/pheapallocate.c,
	score/src/pheapallocatealigned.c, score/src/pheapextend.c,
	score/src/pheapfree.c, score/src/pheapgetblocksize.c,
	score/src/pheapgetfreeinfo.c, score/src/pheapgetinfo.c,
	score/src/pheapinit.c, score/src/pheapresizeblock.c,
	score/src/pheapwalk.c: New files.
This commit is contained in:
Joel Sherrill
2007-05-03 21:33:39 +00:00
parent 40ff680914
commit e746a88b22
17 changed files with 597 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cpukit/libcsupport/src/mallocfreespace.c
+5 -6
View File
@@ -19,6 +19,7 @@
#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__
#include <rtems.h>
#include <rtems/libcsupport.h>
#include <rtems/score/protectedheap.h>
#include <stdio.h>
#include <stdlib.h>
@@ -27,7 +28,7 @@
#include <errno.h>
#include <string.h>
extern rtems_id RTEMS_Malloc_Heap;
extern Heap_Control RTEMS_Malloc_Heap;
/*
* Find amount of free heap remaining
@@ -35,10 +36,8 @@ extern rtems_id RTEMS_Malloc_Heap;
size_t malloc_free_space( void )
{
region_information_block heap_info;
Heap_Information info;
if ( !rtems_region_get_free_information( RTEMS_Malloc_Heap, &heap_info ) ) {
return (size_t) heap_info.Free.largest;
}
return (size_t) -1;
_Protected_heap_Get_free_information( &RTEMS_Malloc_Heap, &info );
return (size_t) info.largest;
}