Mercurial > hg > nginx
view src/core/ngx_buf.c @ 8069:a423e314c22f
Win32: disabled threads support in OpenSSL builds.
Threads are disabled during UNIX builds (see b329c0ab1a48), and also not
needed for Windows builds.
This used to be the default before OpenSSL 1.1.0.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 07 Sep 2022 00:47:31 +0300 |
parents | c7a8bdf5af55 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> ngx_buf_t * ngx_create_temp_buf(ngx_pool_t *pool, size_t size) { ngx_buf_t *b; b = ngx_calloc_buf(pool); if (b == NULL) { return NULL; } b->start = ngx_palloc(pool, size); if (b->start == NULL) { return NULL; } /* * set by ngx_calloc_buf(): * * b->file_pos = 0; * b->file_last = 0; * b->file = NULL; * b->shadow = NULL; * b->tag = 0; * and flags */ b->pos = b->start; b->last = b->start; b->end = b->last + size; b->temporary = 1; return b; } ngx_chain_t * ngx_alloc_chain_link(ngx_pool_t *pool) { ngx_chain_t *cl; cl = pool->chain; if (cl) { pool->chain = cl->next; return cl; } cl = ngx_palloc(pool, sizeof(ngx_chain_t)); if (cl == NULL) { return NULL; } return cl; } ngx_chain_t * ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs) { u_char *p; ngx_int_t i; ngx_buf_t *b; ngx_chain_t *chain, *cl, **ll; p = ngx_palloc(pool, bufs->num * bufs->size); if (p == NULL) { return NULL; } ll = &chain; for (i = 0; i < bufs->num; i++) { b = ngx_calloc_buf(pool); if (b == NULL) { return NULL; } /* * set by ngx_calloc_buf(): * * b->file_pos = 0; * b->file_last = 0; * b->file = NULL; * b->shadow = NULL; * b->tag = 0; * and flags * */ b->pos = p; b->last = p; b->temporary = 1; b->start = p; p += bufs->size; b->end = p; cl = ngx_alloc_chain_link(pool); if (cl == NULL) { return NULL; } cl->buf = b; *ll = cl; ll = &cl->next; } *ll = NULL; return chain; } ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in) { ngx_chain_t *cl, **ll; ll = chain; for (cl = *chain; cl; cl = cl->next) { ll = &cl->next; } while (in) { cl = ngx_alloc_chain_link(pool); if (cl == NULL) { *ll = NULL; return NGX_ERROR; } cl->buf = in->buf; *ll = cl; ll = &cl->next; in = in->next; } *ll = NULL; return NGX_OK; } ngx_chain_t * ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free) { ngx_chain_t *cl; if (*free) { cl = *free; *free = cl->next; cl->next = NULL; return cl; } cl = ngx_alloc_chain_link(p); if (cl == NULL) { return NULL; } cl->buf = ngx_calloc_buf(p); if (cl->buf == NULL) { return NULL; } cl->next = NULL; return cl; } void ngx_chain_update_chains(ngx_pool_t *p, ngx_chain_t **free, ngx_chain_t **busy, ngx_chain_t **out, ngx_buf_tag_t tag) { ngx_chain_t *cl; if (*out) { if (*busy == NULL) { *busy = *out; } else { for (cl = *busy; cl->next; cl = cl->next) { /* void */ } cl->next = *out; } *out = NULL; } while (*busy) { cl = *busy; if (cl->buf->tag != tag) { *busy = cl->next; ngx_free_chain(p, cl); continue; } if (ngx_buf_size(cl->buf) != 0) { break; } cl->buf->pos = cl->buf->start; cl->buf->last = cl->buf->start; *busy = cl->next; cl->next = *free; *free = cl; } } off_t ngx_chain_coalesce_file(ngx_chain_t **in, off_t limit) { off_t total, size, aligned, fprev; ngx_fd_t fd; ngx_chain_t *cl; total = 0; cl = *in; fd = cl->buf->file->fd; do { size = cl->buf->file_last - cl->buf->file_pos; if (size > limit - total) { size = limit - total; aligned = (cl->buf->file_pos + size + ngx_pagesize - 1) & ~((off_t) ngx_pagesize - 1); if (aligned <= cl->buf->file_last) { size = aligned - cl->buf->file_pos; } total += size; break; } total += size; fprev = cl->buf->file_pos + size; cl = cl->next; } while (cl && cl->buf->in_file && total < limit && fd == cl->buf->file->fd && fprev == cl->buf->file_pos); *in = cl; return total; } ngx_chain_t * ngx_chain_update_sent(ngx_chain_t *in, off_t sent) { off_t size; for ( /* void */ ; in; in = in->next) { if (ngx_buf_special(in->buf)) { continue; } if (sent == 0) { break; } size = ngx_buf_size(in->buf); if (sent >= size) { sent -= size; if (ngx_buf_in_memory(in->buf)) { in->buf->pos = in->buf->last; } if (in->buf->in_file) { in->buf->file_pos = in->buf->file_last; } continue; } if (ngx_buf_in_memory(in->buf)) { in->buf->pos += (size_t) sent; } if (in->buf->in_file) { in->buf->file_pos += sent; } break; } return in; }