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split ngx_output_chain()

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This commit is contained in:
Igor Sysoev 2008-09-03 10:01:29 +00:00
parent 3b63d7cbb3
commit 98007c1761
1 changed files with 64 additions and 59 deletions
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123
src/core/ngx_output_chain.c
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@ -21,6 +21,8 @@ static ngx_inline ngx_int_t
ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf);
static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool,
ngx_chain_t **chain, ngx_chain_t *in);
static ngx_int_t ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx,
off_t bsize);
static ngx_int_t ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src,
ngx_uint_t sendfile);
@ -29,10 +31,7 @@ ngx_int_t
ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in)
{
off_t bsize;
size_t size;
ngx_int_t rc, last;
ngx_uint_t recycled;
ngx_buf_t *b;
ngx_chain_t *cl, *out, **last_out;
if (ctx->in == NULL && ctx->busy == NULL) {
@ -130,62 +129,8 @@ ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in)
break;
} else {
size = ctx->bufs.size;
recycled = 1;
if (ctx->in->buf->last_in_chain) {
if (bsize < (off_t) ctx->bufs.size) {
/*
* allocate small temp buf for the small last buf
* or its small last part
*/
size = (size_t) bsize;
recycled = 0;
} else if (ctx->bufs.num == 1
&& (bsize < (off_t) (ctx->bufs.size
+ (ctx->bufs.size >> 2))))
{
/*
* allocate a temp buf that equals
* to the last buf if the last buf size is lesser
* than 1.25 of bufs.size and a temp buf is single
*/
size = (size_t) bsize;
recycled = 0;
}
}
b = ngx_calloc_buf(ctx->pool);
if (b == NULL) {
return NGX_ERROR;
}
/*
* allocate block aligned to a disk sector size
* to enable O_DIRECT
*/
b->start = ngx_pmemalign(ctx->pool, size, 512);
if (b->start == NULL) {
return NGX_ERROR;
}
b->pos = b->start;
b->last = b->start;
b->end = b->last + size;
b->temporary = 1;
b->tag = ctx->tag;
b->recycled = recycled;
ctx->buf = b;
ctx->allocated++;
} else if (ngx_output_chain_get_buf(ctx, bsize) != NGX_OK) {
return NGX_ERROR;
}
}
@ -351,6 +296,66 @@ ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
}
static ngx_int_t
ngx_output_chain_get_buf(ngx_output_chain_ctx_t *ctx, off_t bsize)
{
size_t size;
ngx_buf_t *b;
ngx_uint_t recycled;
size = ctx->bufs.size;
recycled = 1;
if (ctx->in->buf->last_in_chain) {
if (bsize < (off_t) size) {
/*
* allocate a small temp buf for a small last buf
* or its small last part
*/
size = (size_t) bsize;
recycled = 0;
} else if (ctx->bufs.num == 1 && (bsize < (off_t) (size + size / 4))) {
/*
* allocate a temp buf that equals to a last buf, if the last buf
* size is lesser than 1.25 of bufs.size and the temp buf is single
*/
size = (size_t) bsize;
recycled = 0;
}
}
b = ngx_calloc_buf(ctx->pool);
if (b == NULL) {
return NGX_ERROR;
}
/* allocate block aligned to a disk sector size to enable O_DIRECT */
b->start = ngx_pmemalign(ctx->pool, size, 512);
if (b->start == NULL) {
return NGX_ERROR;
}
b->pos = b->start;
b->last = b->start;
b->end = b->last + size;
b->temporary = 1;
b->tag = ctx->tag;
b->recycled = recycled;
ctx->buf = b;
ctx->allocated++;
return NGX_OK;
}
static ngx_int_t
ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile)
{