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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_aio.h>
ngx_chain_t *ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in)
{
int rc;
char *buf, *prev;
off_t sent;
size_t size;
ngx_err_t err;
ngx_chain_t *ce;
sent = 0;
ce = in;
while (ce) {
ngx_log_debug(c->log, "aio_write ce: %x" _ ce->hunk->pos);
buf = prev = ce->hunk->pos;
size = 0;
/* coalesce the neighbouring chain entries */
while (ce && prev == ce->hunk->pos) {
size += ce->hunk->last - ce->hunk->pos;
prev = ce->hunk->last;
ce = ce->next;
}
rc = ngx_aio_write(c, buf, size);
ngx_log_debug(c->log, "aio_write rc: %d" _ rc);
if (rc > 0) {
sent += rc;
c->sent += rc;
} else if (rc == NGX_ERROR) {
return NGX_CHAIN_ERROR;
} else if (rc == NGX_AGAIN) {
break;
}
}
#if (NGX_DEBUG_WRITE_CHAIN)
ngx_log_debug(c->log, "aio_write sent: " OFF_FMT _ c->sent);
#endif
for (ce = in; ce; ce = ce->next) {
#if (NGX_DEBUG_WRITE_CHAIN)
ngx_log_debug(c->log, "write chain: %x %qx %qd" _
ce->hunk->type _
ce->hunk->file_pos _
ce->hunk->file_last - ce->hunk->file_pos);
#endif
if (sent >= ce->hunk->file_last - ce->hunk->file_pos) {
sent -= ce->hunk->file_last - ce->hunk->file_pos;
ce->hunk->file_pos = ce->hunk->file_last;
#if (NGX_DEBUG_WRITE_CHAIN)
ngx_log_debug(c->log, "write chain done: %qx %qd" _
ce->hunk->file_pos _ sent);
#endif
continue;
}
ce->hunk->file_pos += sent;
#if (NGX_DEBUG_WRITE_CHAIN)
ngx_log_debug(c->log, "write chain rest: %qx %qd" _
ce->hunk->file_pos _
ce->hunk->file_last - ce->hunk->file_pos);
#endif
break;
}
return ce;
}
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