Annotation of embedaddon/curl/lib/multihandle.h, revision 1.1
1.1 ! misho 1: #ifndef HEADER_CURL_MULTIHANDLE_H
! 2: #define HEADER_CURL_MULTIHANDLE_H
! 3: /***************************************************************************
! 4: * _ _ ____ _
! 5: * Project ___| | | | _ \| |
! 6: * / __| | | | |_) | |
! 7: * | (__| |_| | _ <| |___
! 8: * \___|\___/|_| \_\_____|
! 9: *
! 10: * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
! 11: *
! 12: * This software is licensed as described in the file COPYING, which
! 13: * you should have received as part of this distribution. The terms
! 14: * are also available at https://curl.haxx.se/docs/copyright.html.
! 15: *
! 16: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 17: * copies of the Software, and permit persons to whom the Software is
! 18: * furnished to do so, under the terms of the COPYING file.
! 19: *
! 20: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 21: * KIND, either express or implied.
! 22: *
! 23: ***************************************************************************/
! 24:
! 25: #include "conncache.h"
! 26: #include "psl.h"
! 27: #include "socketpair.h"
! 28:
! 29: struct Curl_message {
! 30: struct curl_llist_element list;
! 31: /* the 'CURLMsg' is the part that is visible to the external user */
! 32: struct CURLMsg extmsg;
! 33: };
! 34:
! 35: /* NOTE: if you add a state here, add the name to the statename[] array as
! 36: well!
! 37: */
! 38: typedef enum {
! 39: CURLM_STATE_INIT, /* 0 - start in this state */
! 40: CURLM_STATE_CONNECT_PEND, /* 1 - no connections, waiting for one */
! 41: CURLM_STATE_CONNECT, /* 2 - resolve/connect has been sent off */
! 42: CURLM_STATE_WAITRESOLVE, /* 3 - awaiting the resolve to finalize */
! 43: CURLM_STATE_WAITCONNECT, /* 4 - awaiting the TCP connect to finalize */
! 44: CURLM_STATE_WAITPROXYCONNECT, /* 5 - awaiting HTTPS proxy SSL initialization
! 45: to complete and/or proxy CONNECT to
! 46: finalize */
! 47: CURLM_STATE_SENDPROTOCONNECT, /* 6 - initiate protocol connect procedure */
! 48: CURLM_STATE_PROTOCONNECT, /* 7 - completing the protocol-specific connect
! 49: phase */
! 50: CURLM_STATE_DO, /* 8 - start send off the request (part 1) */
! 51: CURLM_STATE_DOING, /* 9 - sending off the request (part 1) */
! 52: CURLM_STATE_DO_MORE, /* 10 - send off the request (part 2) */
! 53: CURLM_STATE_DO_DONE, /* 11 - done sending off request */
! 54: CURLM_STATE_PERFORM, /* 12 - transfer data */
! 55: CURLM_STATE_TOOFAST, /* 13 - wait because limit-rate exceeded */
! 56: CURLM_STATE_DONE, /* 14 - post data transfer operation */
! 57: CURLM_STATE_COMPLETED, /* 15 - operation complete */
! 58: CURLM_STATE_MSGSENT, /* 16 - the operation complete message is sent */
! 59: CURLM_STATE_LAST /* 17 - not a true state, never use this */
! 60: } CURLMstate;
! 61:
! 62: /* we support N sockets per easy handle. Set the corresponding bit to what
! 63: action we should wait for */
! 64: #define MAX_SOCKSPEREASYHANDLE 5
! 65: #define GETSOCK_READABLE (0x00ff)
! 66: #define GETSOCK_WRITABLE (0xff00)
! 67:
! 68: #define CURLPIPE_ANY (CURLPIPE_MULTIPLEX)
! 69:
! 70: #if defined(USE_SOCKETPAIR) && !defined(USE_BLOCKING_SOCKETS)
! 71: #define ENABLE_WAKEUP
! 72: #endif
! 73:
! 74:
! 75: /* value for MAXIMUM CONCURRENT STREAMS upper limit */
! 76: #define INITIAL_MAX_CONCURRENT_STREAMS ((1U << 31) - 1)
! 77:
! 78: /* This is the struct known as CURLM on the outside */
! 79: struct Curl_multi {
! 80: /* First a simple identifier to easier detect if a user mix up
! 81: this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */
! 82: long type;
! 83:
! 84: /* We have a doubly-linked circular list with easy handles */
! 85: struct Curl_easy *easyp;
! 86: struct Curl_easy *easylp; /* last node */
! 87:
! 88: int num_easy; /* amount of entries in the linked list above. */
! 89: int num_alive; /* amount of easy handles that are added but have not yet
! 90: reached COMPLETE state */
! 91:
! 92: struct curl_llist msglist; /* a list of messages from completed transfers */
! 93:
! 94: struct curl_llist pending; /* Curl_easys that are in the
! 95: CURLM_STATE_CONNECT_PEND state */
! 96:
! 97: /* callback function and user data pointer for the *socket() API */
! 98: curl_socket_callback socket_cb;
! 99: void *socket_userp;
! 100:
! 101: /* callback function and user data pointer for server push */
! 102: curl_push_callback push_cb;
! 103: void *push_userp;
! 104:
! 105: /* Hostname cache */
! 106: struct curl_hash hostcache;
! 107:
! 108: #ifdef USE_LIBPSL
! 109: /* PSL cache. */
! 110: struct PslCache psl;
! 111: #endif
! 112:
! 113: /* timetree points to the splay-tree of time nodes to figure out expire
! 114: times of all currently set timers */
! 115: struct Curl_tree *timetree;
! 116:
! 117: /* 'sockhash' is the lookup hash for socket descriptor => easy handles (note
! 118: the pluralis form, there can be more than one easy handle waiting on the
! 119: same actual socket) */
! 120: struct curl_hash sockhash;
! 121:
! 122: /* Shared connection cache (bundles)*/
! 123: struct conncache conn_cache;
! 124:
! 125: long maxconnects; /* if >0, a fixed limit of the maximum number of entries
! 126: we're allowed to grow the connection cache to */
! 127:
! 128: long max_host_connections; /* if >0, a fixed limit of the maximum number
! 129: of connections per host */
! 130:
! 131: long max_total_connections; /* if >0, a fixed limit of the maximum number
! 132: of connections in total */
! 133:
! 134: /* timer callback and user data pointer for the *socket() API */
! 135: curl_multi_timer_callback timer_cb;
! 136: void *timer_userp;
! 137: struct curltime timer_lastcall; /* the fixed time for the timeout for the
! 138: previous callback */
! 139: unsigned int max_concurrent_streams;
! 140:
! 141: #ifdef ENABLE_WAKEUP
! 142: curl_socket_t wakeup_pair[2]; /* socketpair() used for wakeup
! 143: 0 is used for read, 1 is used for write */
! 144: #endif
! 145: /* multiplexing wanted */
! 146: bool multiplexing;
! 147: bool recheckstate; /* see Curl_multi_connchanged */
! 148: bool in_callback; /* true while executing a callback */
! 149: bool ipv6_works;
! 150: };
! 151:
! 152: #endif /* HEADER_CURL_MULTIHANDLE_H */
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