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multi: add curl_multi_wait()

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/*
 * Name:     curl_multi_wait()
 *
 * Desc:     Poll on all fds within a CURLM set as well as any
 *           additional fds passed to the function.
 *
 * Returns:  CURLMcode type, general multi error code.
 */
CURL_EXTERN CURLMcode curl_multi_wait(CURLM *multi_handle,
                                      struct curl_waitfd extra_fds[],
                                      unsigned int extra_nfds,
                                      int timeout_ms);
This commit is contained in:
Sara Golemon 2012-08-27 12:48:55 -07:00 committed by Daniel Stenberg
parent 2f6e1a8cc3
commit de24d7bd4c
2 changed files with 114 additions and 1 deletions
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28
include/curl/multi.h
View File

@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@ -89,6 +89,19 @@ struct CURLMsg {
};
typedef struct CURLMsg CURLMsg;
/* Based on poll(2) structure and values.
* We don't use pollfd and POLL* constants explicitly
* to cover platforms without poll(). */
#define CURL_WAIT_POLLIN 0x0001
#define CURL_WAIT_POLLPRI 0x0002
#define CURL_WAIT_POLLOUT 0x0004
struct curl_waitfd {
curl_socket_t fd;
short events;
short revents; /* not supported yet */
};
/*
* Name: curl_multi_init()
*
@ -133,6 +146,19 @@ CURL_EXTERN CURLMcode curl_multi_fdset(CURLM *multi_handle,
fd_set *exc_fd_set,
int *max_fd);
/*
* Name: curl_multi_wait()
*
* Desc: Poll on all fds within a CURLM set as well as any
* additional fds passed to the function.
*
* Returns: CURLMcode type, general multi error code.
*/
CURL_EXTERN CURLMcode curl_multi_wait(CURLM *multi_handle,
struct curl_waitfd extra_fds[],
unsigned int extra_nfds,
int timeout_ms);
/*
* Name: curl_multi_perform()
*

87
lib/multi.c
View File

@ -941,6 +941,93 @@ CURLMcode curl_multi_fdset(CURLM *multi_handle,
return CURLM_OK;
}
CURLMcode curl_multi_wait(CURLM *multi_handle,
struct curl_waitfd extra_fds[],
unsigned int extra_nfds,
int timeout_ms)
{
struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
struct Curl_one_easy *easy;
curl_socket_t sockbunch[MAX_SOCKSPEREASYHANDLE];
int bitmap;
unsigned int i;
unsigned int nfds = extra_nfds;
struct pollfd *ufds;
if(!GOOD_MULTI_HANDLE(multi))
return CURLM_BAD_HANDLE;
/* Count up how many fds we have from the multi handle */
easy=multi->easy.next;
while(easy != &multi->easy) {
bitmap = multi_getsock(easy, sockbunch, MAX_SOCKSPEREASYHANDLE);
for(i=0; i< MAX_SOCKSPEREASYHANDLE; i++) {
curl_socket_t s = CURL_SOCKET_BAD;
if(bitmap & GETSOCK_READSOCK(i)) {
++nfds;
s = sockbunch[i];
}
if(bitmap & GETSOCK_WRITESOCK(i)) {
++nfds;
s = sockbunch[i];
}
if(s == CURL_SOCKET_BAD) {
break;
}
}
easy = easy->next; /* check next handle */
}
ufds = (struct pollfd *)malloc(nfds * sizeof(struct pollfd));
nfds = 0;
/* Add the curl handles to our pollfds first */
easy=multi->easy.next;
while(easy != &multi->easy) {
bitmap = multi_getsock(easy, sockbunch, MAX_SOCKSPEREASYHANDLE);
for(i=0; i< MAX_SOCKSPEREASYHANDLE; i++) {
curl_socket_t s = CURL_SOCKET_BAD;
if(bitmap & GETSOCK_READSOCK(i)) {
ufds[nfds].fd = sockbunch[i];
ufds[nfds].events = POLLIN;
++nfds;
s = sockbunch[i];
}
if(bitmap & GETSOCK_WRITESOCK(i)) {
ufds[nfds].fd = sockbunch[i];
ufds[nfds].events = POLLOUT;
++nfds;
s = sockbunch[i];
}
if(s == CURL_SOCKET_BAD) {
break;
}
}
easy = easy->next; /* check next handle */
}
/* Add external file descriptions from poll-like struct curl_waitfd */
for(i = 0; i < extra_nfds; i++) {
ufds[nfds].fd = extra_fds[i].fd;
ufds[nfds].events = (short) (
((extra_fds[i].events & CURL_WAIT_POLLIN) ? POLLIN : 0) |
((extra_fds[i].events & CURL_WAIT_POLLPRI) ? POLLPRI : 0) |
((extra_fds[i].events & CURL_WAIT_POLLOUT) ? POLLOUT : 0) );
++nfds;
}
/* wait... */
Curl_poll(ufds, nfds, timeout_ms);
free(ufds);
return CURLM_OK;
}
static CURLMcode multi_runsingle(struct Curl_multi *multi,
struct timeval now,
struct Curl_one_easy *easy)