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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-02 15:36:20 +1000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-02 15:36:20 +1000 |
commit | 1d880992fd8c8457a2d990ac6622cfd58fb1b261 (patch) | |
tree | c4c843b12e96b5612c315db5a23c5da1a900618c /core/malloc.c | |
download | skiboot-1d880992fd8c8457a2d990ac6622cfd58fb1b261.zip skiboot-1d880992fd8c8457a2d990ac6622cfd58fb1b261.tar.gz skiboot-1d880992fd8c8457a2d990ac6622cfd58fb1b261.tar.bz2 |
Initial commit of Open Source release
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'core/malloc.c')
-rw-r--r-- | core/malloc.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/core/malloc.c b/core/malloc.c new file mode 100644 index 0000000..692a501 --- /dev/null +++ b/core/malloc.c @@ -0,0 +1,84 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* Wrappers for malloc, et. al. */ +#include <mem_region.h> +#include <lock.h> +#include <string.h> +#include <mem_region-malloc.h> + +#define DEFAULT_ALIGN __alignof__(long) + +void *__memalign(size_t blocksize, size_t bytes, const char *location) +{ + void *p; + + lock(&mem_region_lock); + p = mem_alloc(&skiboot_heap, bytes, blocksize, location); + unlock(&mem_region_lock); + + return p; +} + +void *__malloc(size_t bytes, const char *location) +{ + return __memalign(DEFAULT_ALIGN, bytes, location); +} + +void __free(void *p, const char *location) +{ + lock(&mem_region_lock); + mem_free(&skiboot_heap, p, location); + unlock(&mem_region_lock); +} + +void *__realloc(void *ptr, size_t size, const char *location) +{ + void *newptr; + + /* Two classic malloc corner cases. */ + if (!size) { + __free(ptr, location); + return NULL; + } + if (!ptr) + return __malloc(size, location); + + lock(&mem_region_lock); + if (mem_resize(&skiboot_heap, ptr, size, location)) { + newptr = ptr; + } else { + newptr = mem_alloc(&skiboot_heap, size, DEFAULT_ALIGN, + location); + if (newptr) { + size_t copy = mem_size(&skiboot_heap, ptr); + if (copy > size) + copy = size; + memcpy(newptr, ptr, copy); + mem_free(&skiboot_heap, ptr, location); + } + } + unlock(&mem_region_lock); + return newptr; +} + +void *__zalloc(size_t bytes, const char *location) +{ + void *p = __malloc(bytes, location); + + if (p) + memset(p, 0, bytes); + return p; +} |