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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
commit | f449f278dd3c70e479a035f50a9bb817a9b433ba (patch) | |
tree | 8ca2bfb785dda9bb4d573acdf9b42aea9cd51383 /src/contrib/mempattern.c | |
parent | Initial commit. (diff) | |
download | knot-upstream.tar.xz knot-upstream.zip |
Adding upstream version 3.2.6.upstream/3.2.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/contrib/mempattern.c')
-rw-r--r-- | src/contrib/mempattern.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/contrib/mempattern.c b/src/contrib/mempattern.c new file mode 100644 index 0000000..f57139d --- /dev/null +++ b/src/contrib/mempattern.c @@ -0,0 +1,122 @@ +/* Copyright (C) 2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + 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 <https://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> + +#include "contrib/mempattern.h" +#include "contrib/string.h" +#include "contrib/ucw/mempool.h" + +static void mm_nofree(void *p) +{ + /* nop */ +} + +static void *mm_malloc(void *ctx, size_t n) +{ + (void)ctx; + return malloc(n); +} + +void *mm_alloc(knot_mm_t *mm, size_t size) +{ + if (mm) { + return mm->alloc(mm->ctx, size); + } else { + return malloc(size); + } +} + +void *mm_calloc(knot_mm_t *mm, size_t nmemb, size_t size) +{ + if (nmemb == 0 || size == 0) { + return NULL; + } + if (mm) { + size_t total_size = nmemb * size; + if (total_size / nmemb != size) { // Overflow check + return NULL; + } + void *mem = mm_alloc(mm, total_size); + if (mem == NULL) { + return NULL; + } + return memzero(mem, total_size); + } else { + return calloc(nmemb, size); + } +} + +void *mm_realloc(knot_mm_t *mm, void *what, size_t size, size_t prev_size) +{ + if (mm) { + void *p = mm->alloc(mm->ctx, size); + if (p == NULL) { + return NULL; + } else { + if (what) { + memcpy(p, what, + prev_size < size ? prev_size : size); + } + mm_free(mm, what); + return p; + } + } else { + return realloc(what, size); + } +} + +char *mm_strdup(knot_mm_t *mm, const char *s) +{ + if (s == NULL) { + return NULL; + } + if (mm) { + size_t len = strlen(s) + 1; + void *mem = mm_alloc(mm, len); + if (mem == NULL) { + return NULL; + } + return memcpy(mem, s, len); + } else { + return strdup(s); + } +} + +void mm_free(knot_mm_t *mm, void *what) +{ + if (mm) { + if (mm->free) { + mm->free(what); + } + } else { + free(what); + } +} + +void mm_ctx_init(knot_mm_t *mm) +{ + mm->ctx = NULL; + mm->alloc = mm_malloc; + mm->free = free; +} + +void mm_ctx_mempool(knot_mm_t *mm, size_t chunk_size) +{ + mm->ctx = mp_new(chunk_size); + mm->alloc = (knot_mm_alloc_t)mp_alloc; + mm->free = mm_nofree; +} |