diff options
Diffstat (limited to 'cpukit/libcsupport/src/malloc.c')
| -rw-r--r-- | cpukit/libcsupport/src/malloc.c | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/cpukit/libcsupport/src/malloc.c b/cpukit/libcsupport/src/malloc.c deleted file mode 100644 index ed053d6e8d..0000000000 --- a/cpukit/libcsupport/src/malloc.c +++ /dev/null @@ -1,358 +0,0 @@ -/* - * RTEMS Malloc Family Implementation - * - * - * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. - * On-Line Applications Research Corporation (OAR). - * All rights assigned to U.S. Government, 1994. - * - * This material may be reproduced by or for the U.S. Government pursuant - * to the copyright license under the clause at DFARS 252.227-7013. This - * notice must appear in all copies of this file and its derivatives. - * - * $Id$ - */ - -#include <rtems.h> -#include "libcsupport.h" -#ifdef RTEMS_NEWLIB -#include <sys/reent.h> -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <assert.h> -#include <errno.h> -#include <string.h> - -rtems_id RTEMS_Malloc_Heap; -size_t RTEMS_Malloc_Sbrk_amount; - -#ifdef RTEMS_DEBUG -#define MALLOC_STATS -#endif - -#ifdef MALLOC_STATS -#define MSBUMP(f,n) malloc_stats.f += (n) - -struct { - unsigned32 space_available; /* current size of malloc area */ - unsigned32 malloc_calls; /* # calls to malloc */ - unsigned32 free_calls; - unsigned32 realloc_calls; - unsigned32 calloc_calls; - unsigned32 max_depth; /* most ever malloc'd at 1 time */ - unsigned64 lifetime_allocated; - unsigned64 lifetime_freed; -} malloc_stats; - -#else /* No malloc_stats */ -#define MSBUMP(f,n) -#endif - -void RTEMS_Malloc_Initialize( - void *start, - size_t length, - size_t sbrk_amount -) -{ - rtems_status_code status; - void *starting_address; - rtems_unsigned32 old_address; - rtems_unsigned32 u32_address; - - /* - * If the starting address is 0 then we are to attempt to - * get length worth of memory using sbrk. Make sure we - * align the address that we get back. - */ - - starting_address = start; - RTEMS_Malloc_Sbrk_amount = sbrk_amount; - - if (!starting_address) { - u32_address = (unsigned int)sbrk(length); - - if (u32_address == -1) { - rtems_fatal_error_occurred( RTEMS_NO_MEMORY ); - /* DOES NOT RETURN!!! */ - } - - if (u32_address & (CPU_ALIGNMENT-1)) { - old_address = u32_address; - u32_address = (u32_address + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); - - /* - * adjust the length by whatever we aligned by - */ - - length -= u32_address - old_address; - } - - starting_address = (void *)u32_address; - } - - /* - * Unfortunately we cannot use assert if this fails because if this - * has failed we do not have a heap and if we do not have a heap - * STDIO cannot work because there will be no buffers. - */ - - status = rtems_region_create( - rtems_build_name( 'H', 'E', 'A', 'P' ), - starting_address, - length, - CPU_ALIGNMENT, - RTEMS_DEFAULT_ATTRIBUTES, - &RTEMS_Malloc_Heap - ); - if ( status != RTEMS_SUCCESSFUL ) - rtems_fatal_error_occurred( status ); - -#ifdef MALLOC_STATS - /* zero all the stats */ - (void) memset(&malloc_stats, 0, sizeof(malloc_stats)); -#endif - - MSBUMP(space_available, length); -} - -void *malloc( - size_t size -) -{ - void *return_this; - void *starting_address; - rtems_unsigned32 the_size; - rtems_unsigned32 sbrk_amount; - rtems_status_code status; - - MSBUMP(malloc_calls, 1); - - if ( !size ) - return (void *) 0; - - /* - * Try to give a segment in the current region if there is not - * enough space then try to grow the region using rtems_region_extend(). - * If this fails then return a NULL pointer. - */ - - status = rtems_region_get_segment( - RTEMS_Malloc_Heap, - size, - RTEMS_NO_WAIT, - RTEMS_NO_TIMEOUT, - &return_this - ); - - if ( status != RTEMS_SUCCESSFUL ) { - /* - * Round to the "requested sbrk amount" so hopefully we won't have - * to grow again for a while. This effectively does sbrk() calls - * in "page" amounts. - */ - - sbrk_amount = RTEMS_Malloc_Sbrk_amount; - - if ( sbrk_amount == 0 ) - return (void *) 0; - - the_size = ((size + sbrk_amount) / sbrk_amount * sbrk_amount); - - if (((rtems_unsigned32)starting_address = sbrk(the_size)) == -1) - return (void *) 0; - - status = rtems_region_extend( - RTEMS_Malloc_Heap, - starting_address, - the_size - ); - if ( status != RTEMS_SUCCESSFUL ) { - sbrk(-the_size); - errno = ENOMEM; - return (void *) 0; - } - - MSBUMP(space_available, the_size); - - status = rtems_region_get_segment( - RTEMS_Malloc_Heap, - size, - RTEMS_NO_WAIT, - RTEMS_NO_TIMEOUT, - &return_this - ); - if ( status != RTEMS_SUCCESSFUL ) { - errno = ENOMEM; - return (void *) 0; - } - } - -#ifdef MALLOC_STATS - if (return_this) - { - unsigned32 actual_size; - unsigned32 current_depth; - status = rtems_region_get_segment_size(RTEMS_Malloc_Heap, return_this, &actual_size); - MSBUMP(lifetime_allocated, actual_size); - current_depth = malloc_stats.lifetime_allocated - malloc_stats.lifetime_freed; - if (current_depth > malloc_stats.max_depth) - malloc_stats.max_depth = current_depth; - } -#endif - - return return_this; -} - -void *calloc( - size_t nelem, - size_t elsize -) -{ - register char *cptr; - int length; - - MSBUMP(calloc_calls, 1); - - length = nelem * elsize; - cptr = malloc( length ); - if ( cptr ) - memset( cptr, '\0', length ); - - return cptr; -} - -void *realloc( - void *ptr, - size_t size -) -{ - rtems_unsigned32 old_size; - rtems_status_code status; - char *new_area; - - MSBUMP(realloc_calls, 1); - - if ( !ptr ) - return malloc( size ); - - if ( !size ) { - free( ptr ); - return (void *) 0; - } - - new_area = malloc( size ); - if ( !new_area ) { - free( ptr ); - return (void *) 0; - } - - status = rtems_region_get_segment_size( RTEMS_Malloc_Heap, ptr, &old_size ); - if ( status != RTEMS_SUCCESSFUL ) { - errno = EINVAL; - return (void *) 0; - } - - memcpy( new_area, ptr, (size < old_size) ? size : old_size ); - free( ptr ); - - return new_area; - -} - -void free( - void *ptr -) -{ - rtems_status_code status; - - MSBUMP(free_calls, 1); - - if ( !ptr ) - return; - -#ifdef MALLOC_STATS - { - unsigned32 size; - status = rtems_region_get_segment_size( RTEMS_Malloc_Heap, ptr, &size ); - if ( status == RTEMS_SUCCESSFUL ) { - MSBUMP(lifetime_freed, size); - } - } -#endif - - status = rtems_region_return_segment( RTEMS_Malloc_Heap, ptr ); - if ( status != RTEMS_SUCCESSFUL ) { - errno = EINVAL; - assert( 0 ); - } -} - -#ifdef MALLOC_STATS -/* - * Dump the malloc statistics - * May be called via atexit() (installable by our bsp) or - * at any time by user - */ - -void malloc_dump(void) -{ - unsigned32 allocated = malloc_stats.lifetime_allocated - malloc_stats.lifetime_freed; - - printf("Malloc stats\n"); - printf(" avail:%uk allocated:%uk (%d%%) max:%uk (%d%%) lifetime:%Luk freed:%Luk\n", - (unsigned int) malloc_stats.space_available / 1024, - (unsigned int) allocated / 1024, - /* avoid float! */ - (allocated * 100) / malloc_stats.space_available, - (unsigned int) malloc_stats.max_depth / 1024, - (malloc_stats.max_depth * 100) / malloc_stats.space_available, - (unsigned long long) malloc_stats.lifetime_allocated / 1024, - (unsigned long long) malloc_stats.lifetime_freed / 1024); - printf(" Call counts: malloc:%d free:%d realloc:%d calloc:%d\n", - malloc_stats.malloc_calls, - malloc_stats.free_calls, - malloc_stats.realloc_calls, - malloc_stats.calloc_calls); -} -#endif - -/* - * "Reentrant" versions of the above routines implemented above. - */ - -#ifdef RTEMS_NEWLIB -void *malloc_r( - struct _reent *ignored, - size_t size -) -{ - return malloc( size ); -} - -void *calloc_r( - size_t nelem, - size_t elsize -) -{ - return calloc( nelem, elsize ); -} - -void *realloc_r( - void *ptr, - size_t size -) -{ - return realloc_r( ptr, size ); -} - -void free_r( - void *ptr -) -{ - free( ptr ); -} -#endif - |