mirror of
https://github.com/moparisthebest/curl
synced 2024-12-22 16:18:48 -05:00
245 lines
6.9 KiB
C
245 lines
6.9 KiB
C
|
/*****************************************************************************
|
||
|
* _ _ ____ _
|
||
|
* Project ___| | | | _ \| |
|
||
|
* / __| | | | |_) | |
|
||
|
* | (__| |_| | _ <| |___
|
||
|
* \___|\___/|_| \_\_____|
|
||
|
*
|
||
|
* Copyright (C) 2001, Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
*
|
||
|
* In order to be useful for every potential user, curl and libcurl are
|
||
|
* dual-licensed under the MPL and the MIT/X-derivate licenses.
|
||
|
*
|
||
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
||
|
* copies of the Software, and permit persons to whom the Software is
|
||
|
* furnished to do so, under the terms of the MPL or the MIT/X-derivate
|
||
|
* licenses. You may pick one of these licenses.
|
||
|
*
|
||
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||
|
* KIND, either express or implied.
|
||
|
*
|
||
|
* $Id$
|
||
|
*****************************************************************************/
|
||
|
|
||
|
#include "setup.h"
|
||
|
|
||
|
#include "multi.h" /* will become <curl/multi.h> soon */
|
||
|
|
||
|
typedef enum {
|
||
|
CURLM_STATE_INIT,
|
||
|
CURLM_STATE_CONNECT,
|
||
|
CURLM_STATE_DO,
|
||
|
CURLM_STATE_PERFORM,
|
||
|
CURLM_STATE_DONE,
|
||
|
CURLM_STATE_COMPLETED,
|
||
|
|
||
|
CURLM_STATE_LAST /* not a true state, never use this */
|
||
|
} CURLMstate;
|
||
|
|
||
|
struct Curl_one_easy {
|
||
|
/* first, two fields for the linked list of these */
|
||
|
struct Curl_one_easy *next;
|
||
|
struct Curl_one_easy *prev;
|
||
|
|
||
|
CURL *easy_handle; /* this is the easy handle for this unit */
|
||
|
CURLMstate state; /* the handle's state */
|
||
|
};
|
||
|
|
||
|
|
||
|
#define CURL_MULTI_HANDLE 0x000bab1e
|
||
|
|
||
|
#define GOOD_MULTI_HANDLE(x) ((x) && ((x)->type == CURL_MULTI_HANDLE))
|
||
|
#define GOOD_EASY_HANDLE(x) (x)
|
||
|
|
||
|
/* This is the struct known as CURLM on the outside */
|
||
|
struct Curl_multi {
|
||
|
/* First a simple identifier to easier detect if a user mix up
|
||
|
this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */
|
||
|
long type;
|
||
|
|
||
|
/* We have a linked list with easy handles */
|
||
|
struct Curl_one_easy first;
|
||
|
/* This is the amount of entries in the linked list above. */
|
||
|
int num_easy;
|
||
|
};
|
||
|
|
||
|
|
||
|
CURLM *curl_multi_init(void)
|
||
|
{
|
||
|
struct Curl_multi *multi;
|
||
|
|
||
|
multi = (void *)malloc(sizeof(struct Curl_multi));
|
||
|
|
||
|
if(multi) {
|
||
|
memset(multi, 0, sizeof(struct Curl_multi));
|
||
|
multi->type = CURL_MULTI_HANDLE;
|
||
|
}
|
||
|
|
||
|
return (CURLM *) multi;
|
||
|
}
|
||
|
|
||
|
CURLMcode curl_multi_add_handle(CURLM *multi_handle,
|
||
|
CURL *easy_handle)
|
||
|
{
|
||
|
struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
|
||
|
struct Curl_one_easy *easy;
|
||
|
|
||
|
/* First, make some basic checks that the CURLM handle is a good handle */
|
||
|
if(!GOOD_MULTI_HANDLE(multi))
|
||
|
return CURLM_BAD_HANDLE;
|
||
|
|
||
|
/* Verify that we got a somewhat good easy handle too */
|
||
|
if(!GOOD_EASY_HANDLE(easy_handle))
|
||
|
return CURLM_BAD_EASY_HANDLE;
|
||
|
|
||
|
/* Now, time to add an easy handle to the multi stack */
|
||
|
easy = (struct Curl_one_easy *)malloc(sizeof(struct Curl_one_easy));
|
||
|
if(!easy)
|
||
|
return CURLM_OUT_OF_MEMORY;
|
||
|
|
||
|
/* clean it all first (just to be sure) */
|
||
|
memset(easy, 0, sizeof(struct Curl_one_easy));
|
||
|
|
||
|
/* set the easy handle */
|
||
|
easy->easy_handle = easy_handle;
|
||
|
easy->state = CURLM_STATE_INIT;
|
||
|
|
||
|
/* We add this new entry first in the list. We make our 'next' point to the
|
||
|
previous next and our 'prev' point back to the 'first' struct */
|
||
|
easy->next = multi->first.next;
|
||
|
easy->prev = &multi->first;
|
||
|
|
||
|
/* make 'easy' the first node in the chain */
|
||
|
multi->first.next = easy;
|
||
|
|
||
|
/* if there was a next node, make sure its 'prev' pointer links back to
|
||
|
the new node */
|
||
|
if(easy->next)
|
||
|
easy->next->prev = easy;
|
||
|
|
||
|
/* increase the node-counter */
|
||
|
multi->num_easy++;
|
||
|
|
||
|
return CURLM_OK;
|
||
|
}
|
||
|
|
||
|
CURLMcode curl_multi_remove_handle(CURLM *multi_handle,
|
||
|
CURL *curl_handle)
|
||
|
{
|
||
|
struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
|
||
|
struct Curl_one_easy *easy;
|
||
|
|
||
|
/* First, make some basic checks that the CURLM handle is a good handle */
|
||
|
if(!GOOD_MULTI_HANDLE(multi))
|
||
|
return CURLM_BAD_HANDLE;
|
||
|
|
||
|
/* Verify that we got a somewhat good easy handle too */
|
||
|
if(!GOOD_EASY_HANDLE(curl_handle))
|
||
|
return CURLM_BAD_EASY_HANDLE;
|
||
|
|
||
|
/* scan through the list and remove the 'curl_handle' */
|
||
|
easy = multi->first.next;
|
||
|
while(easy) {
|
||
|
if(easy->easy_handle == curl_handle)
|
||
|
break;
|
||
|
easy=easy->next;
|
||
|
}
|
||
|
if(easy) {
|
||
|
/* If the 'state' is not INIT or COMPLETED, we might need to do something
|
||
|
nice to put the easy_handle in a good known state when this returns. */
|
||
|
|
||
|
/* make the previous node point to our next */
|
||
|
if(easy->prev)
|
||
|
easy->prev->next = easy->next;
|
||
|
/* make our next point to our previous node */
|
||
|
if(easy->next)
|
||
|
easy->next->prev = easy->prev;
|
||
|
|
||
|
/* NOTE NOTE NOTE
|
||
|
We do not touch the easy handle here! */
|
||
|
free(easy);
|
||
|
|
||
|
return CURLM_OK;
|
||
|
}
|
||
|
else
|
||
|
return CURLM_BAD_EASY_HANDLE; /* twasn't found */
|
||
|
}
|
||
|
|
||
|
CURLMcode curl_multi_fdset(CURLM *multi_handle,
|
||
|
fd_set *read_fd_set, fd_set *write_fd_set,
|
||
|
fd_set *exc_fd_set, int *max_fd)
|
||
|
{
|
||
|
/* Scan through all the easy handles to get the file descriptors set.
|
||
|
Some easy handles may not have connected to the remote host yet,
|
||
|
and then we must make sure that is done. */
|
||
|
struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
|
||
|
struct Curl_one_easy *easy;
|
||
|
|
||
|
if(!GOOD_MULTI_HANDLE(multi))
|
||
|
return CURLM_BAD_HANDLE;
|
||
|
|
||
|
easy=multi->first.next;
|
||
|
while(easy) {
|
||
|
switch(easy->state) {
|
||
|
case CURLM_STATE_INIT:
|
||
|
case CURLM_STATE_CONNECT:
|
||
|
case CURLM_STATE_DO:
|
||
|
case CURLM_STATE_DONE:
|
||
|
/* we want curl_multi_perform() to get called, but we don't have any
|
||
|
file descriptors to set */
|
||
|
break;
|
||
|
case CURLM_STATE_PERFORM:
|
||
|
/* This should have a set of file descriptors for us to set. */
|
||
|
/* after the transfer is done, go DONE */
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
return CURLM_OK;
|
||
|
}
|
||
|
|
||
|
CURLMcode curl_multi_perform(CURLM *multi_handle, int *running_handles)
|
||
|
{
|
||
|
struct Curl_multi *multi=(struct Curl_multi *)multi_handle;
|
||
|
struct Curl_one_easy *easy;
|
||
|
|
||
|
if(!GOOD_MULTI_HANDLE(multi))
|
||
|
return CURLM_BAD_HANDLE;
|
||
|
|
||
|
easy=multi->first.next;
|
||
|
while(easy) {
|
||
|
switch(easy->state) {
|
||
|
case CURLM_STATE_INIT:
|
||
|
/* after init, go CONNECT */
|
||
|
break;
|
||
|
case CURLM_STATE_CONNECT:
|
||
|
/* after connect, go DO */
|
||
|
break;
|
||
|
case CURLM_STATE_DO:
|
||
|
/* after do, go PERFORM */
|
||
|
break;
|
||
|
case CURLM_STATE_PERFORM:
|
||
|
/* read/write data if it is ready to do so */
|
||
|
/* after the transfer is done, go DONE */
|
||
|
break;
|
||
|
case CURLM_STATE_DONE:
|
||
|
/* after we have DONE what we're supposed to do, go COMPLETED */
|
||
|
break;
|
||
|
case CURLM_STATE_COMPLETED:
|
||
|
/* this is a completed transfer */
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
CURLMcode curl_multi_cleanup(CURLM *multi_handle);
|
||
|
|
||
|
int curl_multi_info_open(CURLM *multi_handle, CURLMinfo *info_handle);
|
||
|
|
||
|
CURLMsg *curl_multi_info_read(CURLMinfo *info_handle);
|
||
|
|
||
|
void curl_multi_info_close(CURLMinfo *info_handle);
|