diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/malloc.c | 156 | ||||
| -rw-r--r-- | src/malloc/aligned_alloc.c | 53 | ||||
| -rw-r--r-- | src/malloc/cfree.c | 43 | ||||
| -rw-r--r-- | src/malloc/free.c | 41 | ||||
| -rw-r--r-- | src/malloc/malloc_usable_size.c | 40 | ||||
| -rw-r--r-- | src/malloc/posix_memalign.c | 51 | ||||
| -rw-r--r-- | src/malloc/realloc.c | 53 |
7 files changed, 281 insertions, 156 deletions
diff --git a/src/malloc.c b/src/malloc.c index 9b45607..694f8c4 100644 --- a/src/malloc.c +++ b/src/malloc.c @@ -221,80 +221,6 @@ void* zalloc(size_t size) /** - * Variant of `malloc` that extends, or shrinks, an existing allocation, - * if beneficial and possible, or creates a new allocation with the new - * size, copies the data, and frees the old allocation. The returned - * pointer has an alignment usable for any compiler-independent intrinsic - * data type, if a new pointer is returned. - * - * On error, `ptr` is not freed. - * - * @etymology Memory (realloc)ation. - * - * @param ptr Pointer to the beginning of the old memory allocation. - * The process may crash if it does not point to the - * beginning of a memory allocation on the heap. - * However, if it is `NULL`, this function will behave - * like `malloc`. - * @param size The new allocation size. If zero, this function will - * behave like `free`, and will return `NULL`. - * @return Pointer to the beginning of the new allocation. - * If `size` is zero, `NULL` is returned. On error `NULL` - * is returned and `errno` is set to indicate the error. - * - * @throws ENOMEM The process cannot allocate more memory. - * - * @since Always. - */ -void* realloc(void* ptr, size_t size) -{ - return fast_realloc(ptr, size); -} - - -/** - * Free a memory allocation. - * - * As a slibc extension, `errno` is guaranteed not to be set. - * - * @etymology (Free) allocated memory. - * - * @param ptr Pointer to the beginning of the memory allocation. - * The process may crash if it does not point to the - * beginning of a memory allocation on the heap. - * However, if it is `NULL`, nothing will happen. - * - * @since Always. - */ -void free(void* ptr) -{ - fast_free(ptr); -} - - -/** - * This function is identical to `free`. - * Any argument beyond the first argument, is ignored. - * - * This function uses variadic arguments because there - * there are multiple conflicting specifications for `cfree`. - * - * As a slibc extension, `errno` is guaranteed not to be set. - * - * @param ptr Pointer to the beginning of the memory allocation. - * The process may crash if it does not point to the - * beginning of a memory allocation on the heap. - * However, if it is `NULL`, nothing will happen. - * - * @since Always. - */ -void cfree(void* ptr, ...) -{ - fast_free(ptr); -} - - -/** * Variant of `malloc` that returns an address with a * specified alignment. * @@ -350,36 +276,6 @@ void* memalign(size_t boundary, size_t size) /** - * `posix_memalign(p, b, n)` is equivalent to - * `(*p = memalign(b, n), *p ? 0 : errno)`, except - * `boundary` must also be a multiple of `sizeof(void*)`, - * and `errno` is unspecified. - * - * As a GNU-compliant slibc extension, memory allocated - * with this function can be freed with `free`. - * - * @etymology (POSIX)-extension: (mem)ory alignment. - * - * @param ptrptr Output parameter for the allocated memory. - * @param boundary The alignment. - * @param size The number of bytes to allocated. - * @return Zero on success, a value for `errno` on error. - * - * @throws ENOMEM The process cannot allocate more memory. - * @throws EINVAL If `boundary` is not a power-of-two multiple of `sizeof(void*)`. - * - * @since Always. - */ -int posix_memalign(void** ptrptr, size_t boundary, size_t size) -{ - if (boundary < sizeof(void*)) - return EINVAL; - *ptrptr = memalign(boundary, size); - return *ptrptr ? 0 : errno; -} - - -/** * `valloc(n)` is equivalent to `memalign(sysconf(_SC_PAGESIZE), n)`. * * As a GNU-compliant slibc extension, memory allocated @@ -437,55 +333,3 @@ void* pvalloc(size_t size) return memalign(boundary, full_size); } - -/** - * This function is identical to `memalign`, - * except it can be freed with `free`. - * - * Variant of `malloc` that returns an address with a - * specified alignment. - * - * It is unspecified how the function works. This implemention - * will allocate a bit of extra memory and shift the returned - * pointer so that it is aligned. - * - * @etymology (Alig)ned memory (alloc)ation. - * - * @param boundary The alignment. - * @param size The number of bytes to allocated. - * @return Pointer to the beginning of the new allocation. - * If `size` is zero, this function will either return - * `NULL` (that is what this implement does) or return - * a unique pointer that can later be freed with `free`. - * `NULL` is returned on error, and `errno` is set to - * indicate the error. - * - * @throws ENOMEM The process cannot allocate more memory. - * @throws EINVAL If `boundary` is not a power of two. - * - * @since Always. - */ -void* aligned_alloc(size_t boundary, size_t size) -{ - return memalign(boundary, size); -} - - -/** - * This function returns the allocation size of - * a memory segment. - * - * `p = malloc(n), malloc_usable_size(p)` will return `n`. - * - * @etymology (`malloc`)-subsystem: user-(usable size) of allocation. - * - * @param segment The memory segment. - * @return The size of the memory segment, 0 if `segment` is `NULL`. - * - * @since Always. - */ -size_t malloc_usable_size(void* segment) -{ - return allocsize(segment); -} - diff --git a/src/malloc/aligned_alloc.c b/src/malloc/aligned_alloc.c new file mode 100644 index 0000000..a562ca0 --- /dev/null +++ b/src/malloc/aligned_alloc.c @@ -0,0 +1,53 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> + + + +/** + * This function is identical to `memalign`, + * except it can be freed with `free`. + * + * Variant of `malloc` that returns an address with a + * specified alignment. + * + * It is unspecified how the function works. This implemention + * will allocate a bit of extra memory and shift the returned + * pointer so that it is aligned. + * + * @etymology (Alig)ned memory (alloc)ation. + * + * @param boundary The alignment. + * @param size The number of bytes to allocated. + * @return Pointer to the beginning of the new allocation. + * If `size` is zero, this function will either return + * `NULL` (that is what this implement does) or return + * a unique pointer that can later be freed with `free`. + * `NULL` is returned on error, and `errno` is set to + * indicate the error. + * + * @throws ENOMEM The process cannot allocate more memory. + * @throws EINVAL If `boundary` is not a power of two. + * + * @since Always. + */ +void* aligned_alloc(size_t boundary, size_t size) +{ + return memalign(boundary, size); +} + diff --git a/src/malloc/cfree.c b/src/malloc/cfree.c new file mode 100644 index 0000000..098f9ff --- /dev/null +++ b/src/malloc/cfree.c @@ -0,0 +1,43 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <slibc-alloc.h> + + + +/** + * This function is identical to `free`. + * Any argument beyond the first argument, is ignored. + * + * This function uses variadic arguments because there + * there are multiple conflicting specifications for `cfree`. + * + * As a slibc extension, `errno` is guaranteed not to be set. + * + * @param ptr Pointer to the beginning of the memory allocation. + * The process may crash if it does not point to the + * beginning of a memory allocation on the heap. + * However, if it is `NULL`, nothing will happen. + * + * @since Always. + */ +void cfree(void* ptr, ...) +{ + fast_free(ptr); +} + diff --git a/src/malloc/free.c b/src/malloc/free.c new file mode 100644 index 0000000..3a0ba5a --- /dev/null +++ b/src/malloc/free.c @@ -0,0 +1,41 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <slibc-alloc.h> + + + +/** + * Free a memory allocation. + * + * As a slibc extension, `errno` is guaranteed not to be set. + * + * @etymology (Free) allocated memory. + * + * @param ptr Pointer to the beginning of the memory allocation. + * The process may crash if it does not point to the + * beginning of a memory allocation on the heap. + * However, if it is `NULL`, nothing will happen. + * + * @since Always. + */ +void free(void* ptr) +{ + fast_free(ptr); +} + diff --git a/src/malloc/malloc_usable_size.c b/src/malloc/malloc_usable_size.c new file mode 100644 index 0000000..d44f11e --- /dev/null +++ b/src/malloc/malloc_usable_size.c @@ -0,0 +1,40 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <slibc-alloc.h> + + + +/** + * This function returns the allocation size of + * a memory segment. + * + * `p = malloc(n), malloc_usable_size(p)` will return `n`. + * + * @etymology (`malloc`)-subsystem: user-(usable size) of allocation. + * + * @param segment The memory segment. + * @return The size of the memory segment, 0 if `segment` is `NULL`. + * + * @since Always. + */ +size_t malloc_usable_size(void* segment) +{ + return allocsize(segment); +} + diff --git a/src/malloc/posix_memalign.c b/src/malloc/posix_memalign.c new file mode 100644 index 0000000..80d27c8 --- /dev/null +++ b/src/malloc/posix_memalign.c @@ -0,0 +1,51 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <errno.h> + + + +/** + * `posix_memalign(p, b, n)` is equivalent to + * `(*p = memalign(b, n), *p ? 0 : errno)`, except + * `boundary` must also be a multiple of `sizeof(void*)`, + * and `errno` is unspecified. + * + * As a GNU-compliant slibc extension, memory allocated + * with this function can be freed with `free`. + * + * @etymology (POSIX)-extension: (mem)ory alignment. + * + * @param ptrptr Output parameter for the allocated memory. + * @param boundary The alignment. + * @param size The number of bytes to allocated. + * @return Zero on success, a value for `errno` on error. + * + * @throws ENOMEM The process cannot allocate more memory. + * @throws EINVAL If `boundary` is not a power-of-two multiple of `sizeof(void*)`. + * + * @since Always. + */ +int posix_memalign(void** ptrptr, size_t boundary, size_t size) +{ + if (boundary < sizeof(void*)) + return EINVAL; + *ptrptr = memalign(boundary, size); + return *ptrptr ? 0 : errno; +} + diff --git a/src/malloc/realloc.c b/src/malloc/realloc.c new file mode 100644 index 0000000..4356c2a --- /dev/null +++ b/src/malloc/realloc.c @@ -0,0 +1,53 @@ +/** + * slibc — Yet another C library + * Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <slibc-alloc.h> + + + +/** + * Variant of `malloc` that extends, or shrinks, an existing allocation, + * if beneficial and possible, or creates a new allocation with the new + * size, copies the data, and frees the old allocation. The returned + * pointer has an alignment usable for any compiler-independent intrinsic + * data type, if a new pointer is returned. + * + * On error, `ptr` is not freed. + * + * @etymology Memory (realloc)ation. + * + * @param ptr Pointer to the beginning of the old memory allocation. + * The process may crash if it does not point to the + * beginning of a memory allocation on the heap. + * However, if it is `NULL`, this function will behave + * like `malloc`. + * @param size The new allocation size. If zero, this function will + * behave like `free`, and will return `NULL`. + * @return Pointer to the beginning of the new allocation. + * If `size` is zero, `NULL` is returned. On error `NULL` + * is returned and `errno` is set to indicate the error. + * + * @throws ENOMEM The process cannot allocate more memory. + * + * @since Always. + */ +void* realloc(void* ptr, size_t size) +{ + return fast_realloc(ptr, size); +} + |