mirror of https://github.com/nodejs/node.git
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
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* nghttp3
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*
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* Copyright (c) 2022 nghttp3 contributors
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* Copyright (c) 2022 ngtcp2 contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nghttp3_balloc.h"
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#include <assert.h>
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#include "nghttp3_mem.h"
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void nghttp3_balloc_init(nghttp3_balloc *balloc, size_t blklen,
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const nghttp3_mem *mem) {
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assert((blklen & 0xfu) == 0);
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balloc->mem = mem;
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balloc->blklen = blklen;
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balloc->head = NULL;
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nghttp3_buf_wrap_init(&balloc->buf, (void *)"", 0);
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}
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void nghttp3_balloc_free(nghttp3_balloc *balloc) {
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if (balloc == NULL) {
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return;
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}
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nghttp3_balloc_clear(balloc);
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}
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void nghttp3_balloc_clear(nghttp3_balloc *balloc) {
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nghttp3_memblock_hd *p, *next;
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for (p = balloc->head; p; p = next) {
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next = p->next;
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nghttp3_mem_free(balloc->mem, p);
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}
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balloc->head = NULL;
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nghttp3_buf_wrap_init(&balloc->buf, (void *)"", 0);
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}
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int nghttp3_balloc_get(nghttp3_balloc *balloc, void **pbuf, size_t n) {
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uint8_t *p;
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nghttp3_memblock_hd *hd;
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assert(n <= balloc->blklen);
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if (nghttp3_buf_left(&balloc->buf) < n) {
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p = nghttp3_mem_malloc(balloc->mem, sizeof(nghttp3_memblock_hd) + 0x10u +
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balloc->blklen);
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if (p == NULL) {
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return NGHTTP3_ERR_NOMEM;
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}
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hd = (nghttp3_memblock_hd *)(void *)p;
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hd->next = balloc->head;
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balloc->head = hd;
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nghttp3_buf_wrap_init(
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&balloc->buf,
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(uint8_t *)(((uintptr_t)p + sizeof(nghttp3_memblock_hd) + 0xfu) &
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~(uintptr_t)0xfu),
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balloc->blklen);
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}
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assert(((uintptr_t)balloc->buf.last & 0xfu) == 0);
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*pbuf = balloc->buf.last;
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balloc->buf.last += (n + 0xfu) & ~(uintptr_t)0xfu;
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return 0;
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}
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