diff options
Diffstat (limited to 'db2/os/os_alloc.c')
| -rw-r--r-- | db2/os/os_alloc.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/db2/os/os_alloc.c b/db2/os/os_alloc.c deleted file mode 100644 index 0090eb14a7..0000000000 --- a/db2/os/os_alloc.c +++ /dev/null @@ -1,219 +0,0 @@ -/*- - * See the file LICENSE for redistribution information. - * - * Copyright (c) 1997, 1998 - * Sleepycat Software. All rights reserved. - */ - -#include "config.h" - -#ifndef lint -static const char sccsid[] = "@(#)os_alloc.c 10.10 (Sleepycat) 10/12/98"; -#endif /* not lint */ - -#ifndef NO_SYSTEM_INCLUDES -#include <sys/types.h> - -#include <errno.h> -#include <string.h> -#include <stdlib.h> -#endif - -#include "db_int.h" -#include "os_jump.h" - -/* - * !!! - * Correct for systems that return NULL when you allocate 0 bytes of memory. - * There are several places in DB where we allocate the number of bytes held - * by the key/data item, and it can be 0. Correct here so that malloc never - * returns a NULL for that reason (which behavior is permitted by ANSI). We - * could make these calls macros on non-Alpha architectures (that's where we - * saw the problem), but it's probably not worth the autoconf complexity. - * - * !!! - * Correct for systems that don't set errno when malloc and friends fail. - * - * Out of memory. - * We wish to hold the whole sky, - * But we never will. - */ - -/* - * __os_strdup -- - * The strdup(3) function for DB. - * - * PUBLIC: int __os_strdup __P((const char *, void *)); - */ -int -__os_strdup(str, storep) - const char *str; - void *storep; -{ - size_t size; - int ret; - void *p; - - *(void **)storep = NULL; - - size = strlen(str) + 1; - if ((ret = __os_malloc(size, NULL, &p)) != 0) - return (ret); - - memcpy(p, str, size); - - *(void **)storep = p; - return (0); -} - -/* - * __os_calloc -- - * The calloc(3) function for DB. - * - * PUBLIC: int __os_calloc __P((size_t, size_t, void *)); - */ -int -__os_calloc(num, size, storep) - size_t num, size; - void *storep; -{ - void *p; - int ret; - - size *= num; - if ((ret = __os_malloc(size, NULL, &p)) != 0) - return (ret); - - memset(p, 0, size); - *(void **)storep = p; - - return (0); -} - -/* - * __os_malloc -- - * The malloc(3) function for DB. - * - * PUBLIC: int __os_malloc __P((size_t, void *(*)(size_t), void *)); - */ -int -__os_malloc(size, db_malloc, storep) - size_t size; - void *(*db_malloc) __P((size_t)), *storep; -{ - void *p; - - *(void **)storep = NULL; - - /* Never allocate 0 bytes -- some C libraries don't like it. */ - if (size == 0) - ++size; - - /* Some C libraries don't correctly set errno when malloc(3) fails. */ - errno = 0; - if (db_malloc != NULL) - p = db_malloc(size); - else if (__db_jump.j_malloc != NULL) - p = __db_jump.j_malloc(size); - else - p = malloc(size); - if (p == NULL) { - if (errno == 0) - errno = ENOMEM; - return (errno); - } - -#ifdef DIAGNOSTIC - memset(p, 0xdb, size); -#endif - *(void **)storep = p; - - return (0); -} - -/* - * __os_realloc -- - * The realloc(3) function for DB. - * - * PUBLIC: int __os_realloc __P((void *, size_t)); - */ -int -__os_realloc(storep, size) - void *storep; - size_t size; -{ - void *p, *ptr; - - ptr = *(void **)storep; - - /* If we haven't yet allocated anything yet, simply call malloc. */ - if (ptr == NULL) - return (__os_malloc(size, NULL, storep)); - - /* Never allocate 0 bytes -- some C libraries don't like it. */ - if (size == 0) - ++size; - - /* - * Some C libraries don't correctly set errno when realloc(3) fails. - * - * Don't overwrite the original pointer, there are places in DB we - * try to continue after realloc fails. - */ - errno = 0; - if (__db_jump.j_realloc != NULL) - p = __db_jump.j_realloc(ptr, size); - else - p = realloc(ptr, size); - if (p == NULL) { - if (errno == 0) - errno = ENOMEM; - return (errno); - } - - *(void **)storep = p; - - return (0); -} - -/* - * __os_free -- - * The free(3) function for DB. - * - * PUBLIC: void __os_free __P((void *, size_t)); - */ -void -__os_free(ptr, size) - void *ptr; - size_t size; -{ -#ifdef DIAGNOSTIC - if (size != 0) - memset(ptr, 0xdb, size); -#endif - - if (__db_jump.j_free != NULL) - __db_jump.j_free(ptr); - else - free(ptr); -} - -/* - * __os_freestr -- - * The free(3) function for DB, freeing a string. - * - * PUBLIC: void __os_freestr __P((void *)); - */ -void -__os_freestr(ptr) - void *ptr; -{ -#ifdef DIAGNOSTIC - memset(ptr, 0xdb, strlen(ptr) + 1); -#endif - - if (__db_jump.j_free != NULL) - __db_jump.j_free(ptr); - else - free(ptr); -} |