1275970Scy/* 2275970Scy * Copyright (c) 2008-2012 Niels Provos and Nick Mathewson 3275970Scy * 4275970Scy * Redistribution and use in source and binary forms, with or without 5275970Scy * modification, are permitted provided that the following conditions 6275970Scy * are met: 7275970Scy * 1. Redistributions of source code must retain the above copyright 8275970Scy * notice, this list of conditions and the following disclaimer. 9275970Scy * 2. Redistributions in binary form must reproduce the above copyright 10275970Scy * notice, this list of conditions and the following disclaimer in the 11275970Scy * documentation and/or other materials provided with the distribution. 12275970Scy * 3. The name of the author may not be used to endorse or promote products 13275970Scy * derived from this software without specific prior written permission. 14275970Scy * 15275970Scy * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16275970Scy * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17275970Scy * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18275970Scy * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19275970Scy * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20275970Scy * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21275970Scy * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22275970Scy * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23275970Scy * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24275970Scy * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25275970Scy */ 26275970Scy#ifndef BUFFEREVENT_INTERNAL_H_INCLUDED_ 27275970Scy#define BUFFEREVENT_INTERNAL_H_INCLUDED_ 28275970Scy 29275970Scy#ifdef __cplusplus 30275970Scyextern "C" { 31275970Scy#endif 32275970Scy 33275970Scy#include "event2/event-config.h" 34275970Scy#include "event2/event_struct.h" 35275970Scy#include "evconfig-private.h" 36275970Scy#include "event2/util.h" 37275970Scy#include "defer-internal.h" 38275970Scy#include "evthread-internal.h" 39275970Scy#include "event2/thread.h" 40275970Scy#include "ratelim-internal.h" 41275970Scy#include "event2/bufferevent_struct.h" 42275970Scy 43275970Scy/* These flags are reasons that we might be declining to actually enable 44275970Scy reading or writing on a bufferevent. 45275970Scy */ 46275970Scy 47275970Scy/* On a all bufferevents, for reading: used when we have read up to the 48275970Scy watermark value. 49275970Scy 50275970Scy On a filtering bufferevent, for writing: used when the underlying 51275970Scy bufferevent's write buffer has been filled up to its watermark 52275970Scy value. 53275970Scy*/ 54275970Scy#define BEV_SUSPEND_WM 0x01 55275970Scy/* On a base bufferevent: when we have emptied a bandwidth buckets */ 56275970Scy#define BEV_SUSPEND_BW 0x02 57275970Scy/* On a base bufferevent: when we have emptied the group's bandwidth bucket. */ 58275970Scy#define BEV_SUSPEND_BW_GROUP 0x04 59275970Scy/* On a socket bufferevent: can't do any operations while we're waiting for 60275970Scy * name lookup to finish. */ 61275970Scy#define BEV_SUSPEND_LOOKUP 0x08 62275970Scy/* On a base bufferevent, for reading: used when a filter has choked this 63275970Scy * (underlying) bufferevent because it has stopped reading from it. */ 64275970Scy#define BEV_SUSPEND_FILT_READ 0x10 65275970Scy 66275970Scytypedef ev_uint16_t bufferevent_suspend_flags; 67275970Scy 68275970Scystruct bufferevent_rate_limit_group { 69275970Scy /** List of all members in the group */ 70275970Scy LIST_HEAD(rlim_group_member_list, bufferevent_private) members; 71275970Scy /** Current limits for the group. */ 72275970Scy struct ev_token_bucket rate_limit; 73275970Scy struct ev_token_bucket_cfg rate_limit_cfg; 74275970Scy 75275970Scy /** True iff we don't want to read from any member of the group.until 76275970Scy * the token bucket refills. */ 77275970Scy unsigned read_suspended : 1; 78275970Scy /** True iff we don't want to write from any member of the group.until 79275970Scy * the token bucket refills. */ 80275970Scy unsigned write_suspended : 1; 81275970Scy /** True iff we were unable to suspend one of the bufferevents in the 82275970Scy * group for reading the last time we tried, and we should try 83275970Scy * again. */ 84275970Scy unsigned pending_unsuspend_read : 1; 85275970Scy /** True iff we were unable to suspend one of the bufferevents in the 86275970Scy * group for writing the last time we tried, and we should try 87275970Scy * again. */ 88275970Scy unsigned pending_unsuspend_write : 1; 89275970Scy 90275970Scy /*@{*/ 91275970Scy /** Total number of bytes read or written in this group since last 92275970Scy * reset. */ 93275970Scy ev_uint64_t total_read; 94275970Scy ev_uint64_t total_written; 95275970Scy /*@}*/ 96275970Scy 97275970Scy /** The number of bufferevents in the group. */ 98275970Scy int n_members; 99275970Scy 100275970Scy /** The smallest number of bytes that any member of the group should 101275970Scy * be limited to read or write at a time. */ 102275970Scy ev_ssize_t min_share; 103275970Scy ev_ssize_t configured_min_share; 104275970Scy 105275970Scy /** Timeout event that goes off once a tick, when the bucket is ready 106275970Scy * to refill. */ 107275970Scy struct event master_refill_event; 108275970Scy 109275970Scy /** Seed for weak random number generator. Protected by 'lock' */ 110275970Scy struct evutil_weakrand_state weakrand_seed; 111275970Scy 112275970Scy /** Lock to protect the members of this group. This lock should nest 113275970Scy * within every bufferevent lock: if you are holding this lock, do 114275970Scy * not assume you can lock another bufferevent. */ 115275970Scy void *lock; 116275970Scy}; 117275970Scy 118275970Scy/** Fields for rate-limiting a single bufferevent. */ 119275970Scystruct bufferevent_rate_limit { 120275970Scy /* Linked-list elements for storing this bufferevent_private in a 121275970Scy * group. 122275970Scy * 123275970Scy * Note that this field is supposed to be protected by the group 124275970Scy * lock */ 125275970Scy LIST_ENTRY(bufferevent_private) next_in_group; 126275970Scy /** The rate-limiting group for this bufferevent, or NULL if it is 127275970Scy * only rate-limited on its own. */ 128275970Scy struct bufferevent_rate_limit_group *group; 129275970Scy 130275970Scy /* This bufferevent's current limits. */ 131275970Scy struct ev_token_bucket limit; 132275970Scy /* Pointer to the rate-limit configuration for this bufferevent. 133275970Scy * Can be shared. XXX reference-count this? */ 134275970Scy struct ev_token_bucket_cfg *cfg; 135275970Scy 136275970Scy /* Timeout event used when one this bufferevent's buckets are 137275970Scy * empty. */ 138275970Scy struct event refill_bucket_event; 139275970Scy}; 140275970Scy 141275970Scy/** Parts of the bufferevent structure that are shared among all bufferevent 142275970Scy * types, but not exposed in bufferevent_struct.h. */ 143275970Scystruct bufferevent_private { 144275970Scy /** The underlying bufferevent structure. */ 145275970Scy struct bufferevent bev; 146275970Scy 147275970Scy /** Evbuffer callback to enforce watermarks on input. */ 148275970Scy struct evbuffer_cb_entry *read_watermarks_cb; 149275970Scy 150275970Scy /** If set, we should free the lock when we free the bufferevent. */ 151275970Scy unsigned own_lock : 1; 152275970Scy 153275970Scy /** Flag: set if we have deferred callbacks and a read callback is 154275970Scy * pending. */ 155275970Scy unsigned readcb_pending : 1; 156275970Scy /** Flag: set if we have deferred callbacks and a write callback is 157275970Scy * pending. */ 158275970Scy unsigned writecb_pending : 1; 159275970Scy /** Flag: set if we are currently busy connecting. */ 160275970Scy unsigned connecting : 1; 161275970Scy /** Flag: set if a connect failed prematurely; this is a hack for 162275970Scy * getting around the bufferevent abstraction. */ 163275970Scy unsigned connection_refused : 1; 164275970Scy /** Set to the events pending if we have deferred callbacks and 165275970Scy * an events callback is pending. */ 166275970Scy short eventcb_pending; 167275970Scy 168275970Scy /** If set, read is suspended until one or more conditions are over. 169275970Scy * The actual value here is a bitfield of those conditions; see the 170275970Scy * BEV_SUSPEND_* flags above. */ 171275970Scy bufferevent_suspend_flags read_suspended; 172275970Scy 173275970Scy /** If set, writing is suspended until one or more conditions are over. 174275970Scy * The actual value here is a bitfield of those conditions; see the 175275970Scy * BEV_SUSPEND_* flags above. */ 176275970Scy bufferevent_suspend_flags write_suspended; 177275970Scy 178275970Scy /** Set to the current socket errno if we have deferred callbacks and 179275970Scy * an events callback is pending. */ 180275970Scy int errno_pending; 181275970Scy 182275970Scy /** The DNS error code for bufferevent_socket_connect_hostname */ 183275970Scy int dns_error; 184275970Scy 185275970Scy /** Used to implement deferred callbacks */ 186275970Scy struct event_callback deferred; 187275970Scy 188275970Scy /** The options this bufferevent was constructed with */ 189275970Scy enum bufferevent_options options; 190275970Scy 191275970Scy /** Current reference count for this bufferevent. */ 192275970Scy int refcnt; 193275970Scy 194275970Scy /** Lock for this bufferevent. Shared by the inbuf and the outbuf. 195275970Scy * If NULL, locking is disabled. */ 196275970Scy void *lock; 197275970Scy 198275970Scy /** No matter how big our bucket gets, don't try to read more than this 199275970Scy * much in a single read operation. */ 200275970Scy ev_ssize_t max_single_read; 201275970Scy 202275970Scy /** No matter how big our bucket gets, don't try to write more than this 203275970Scy * much in a single write operation. */ 204275970Scy ev_ssize_t max_single_write; 205275970Scy 206275970Scy /** Rate-limiting information for this bufferevent */ 207275970Scy struct bufferevent_rate_limit *rate_limiting; 208275970Scy}; 209275970Scy 210275970Scy/** Possible operations for a control callback. */ 211275970Scyenum bufferevent_ctrl_op { 212275970Scy BEV_CTRL_SET_FD, 213275970Scy BEV_CTRL_GET_FD, 214275970Scy BEV_CTRL_GET_UNDERLYING, 215275970Scy BEV_CTRL_CANCEL_ALL 216275970Scy}; 217275970Scy 218275970Scy/** Possible data types for a control callback */ 219275970Scyunion bufferevent_ctrl_data { 220275970Scy void *ptr; 221275970Scy evutil_socket_t fd; 222275970Scy}; 223275970Scy 224275970Scy/** 225275970Scy Implementation table for a bufferevent: holds function pointers and other 226275970Scy information to make the various bufferevent types work. 227275970Scy*/ 228275970Scystruct bufferevent_ops { 229275970Scy /** The name of the bufferevent's type. */ 230275970Scy const char *type; 231275970Scy /** At what offset into the implementation type will we find a 232275970Scy bufferevent structure? 233275970Scy 234275970Scy Example: if the type is implemented as 235275970Scy struct bufferevent_x { 236275970Scy int extra_data; 237275970Scy struct bufferevent bev; 238275970Scy } 239275970Scy then mem_offset should be offsetof(struct bufferevent_x, bev) 240275970Scy */ 241275970Scy off_t mem_offset; 242275970Scy 243275970Scy /** Enables one or more of EV_READ|EV_WRITE on a bufferevent. Does 244275970Scy not need to adjust the 'enabled' field. Returns 0 on success, -1 245275970Scy on failure. 246275970Scy */ 247275970Scy int (*enable)(struct bufferevent *, short); 248275970Scy 249275970Scy /** Disables one or more of EV_READ|EV_WRITE on a bufferevent. Does 250275970Scy not need to adjust the 'enabled' field. Returns 0 on success, -1 251275970Scy on failure. 252275970Scy */ 253275970Scy int (*disable)(struct bufferevent *, short); 254275970Scy 255275970Scy /** Detatches the bufferevent from related data structures. Called as 256275970Scy * soon as its reference count reaches 0. */ 257275970Scy void (*unlink)(struct bufferevent *); 258275970Scy 259275970Scy /** Free any storage and deallocate any extra data or structures used 260275970Scy in this implementation. Called when the bufferevent is 261275970Scy finalized. 262275970Scy */ 263275970Scy void (*destruct)(struct bufferevent *); 264275970Scy 265275970Scy /** Called when the timeouts on the bufferevent have changed.*/ 266275970Scy int (*adj_timeouts)(struct bufferevent *); 267275970Scy 268275970Scy /** Called to flush data. */ 269275970Scy int (*flush)(struct bufferevent *, short, enum bufferevent_flush_mode); 270275970Scy 271275970Scy /** Called to access miscellaneous fields. */ 272275970Scy int (*ctrl)(struct bufferevent *, enum bufferevent_ctrl_op, union bufferevent_ctrl_data *); 273275970Scy 274275970Scy}; 275275970Scy 276275970Scyextern const struct bufferevent_ops bufferevent_ops_socket; 277275970Scyextern const struct bufferevent_ops bufferevent_ops_filter; 278275970Scyextern const struct bufferevent_ops bufferevent_ops_pair; 279275970Scy 280275970Scy#define BEV_IS_SOCKET(bevp) ((bevp)->be_ops == &bufferevent_ops_socket) 281275970Scy#define BEV_IS_FILTER(bevp) ((bevp)->be_ops == &bufferevent_ops_filter) 282275970Scy#define BEV_IS_PAIR(bevp) ((bevp)->be_ops == &bufferevent_ops_pair) 283275970Scy 284275970Scy#ifdef _WIN32 285275970Scyextern const struct bufferevent_ops bufferevent_ops_async; 286275970Scy#define BEV_IS_ASYNC(bevp) ((bevp)->be_ops == &bufferevent_ops_async) 287275970Scy#else 288275970Scy#define BEV_IS_ASYNC(bevp) 0 289275970Scy#endif 290275970Scy 291275970Scy/** Initialize the shared parts of a bufferevent. */ 292275970Scyint bufferevent_init_common_(struct bufferevent_private *, struct event_base *, const struct bufferevent_ops *, enum bufferevent_options options); 293275970Scy 294275970Scy/** For internal use: temporarily stop all reads on bufev, until the conditions 295275970Scy * in 'what' are over. */ 296275970Scyvoid bufferevent_suspend_read_(struct bufferevent *bufev, bufferevent_suspend_flags what); 297275970Scy/** For internal use: clear the conditions 'what' on bufev, and re-enable 298275970Scy * reading if there are no conditions left. */ 299275970Scyvoid bufferevent_unsuspend_read_(struct bufferevent *bufev, bufferevent_suspend_flags what); 300275970Scy 301275970Scy/** For internal use: temporarily stop all writes on bufev, until the conditions 302275970Scy * in 'what' are over. */ 303275970Scyvoid bufferevent_suspend_write_(struct bufferevent *bufev, bufferevent_suspend_flags what); 304275970Scy/** For internal use: clear the conditions 'what' on bufev, and re-enable 305275970Scy * writing if there are no conditions left. */ 306275970Scyvoid bufferevent_unsuspend_write_(struct bufferevent *bufev, bufferevent_suspend_flags what); 307275970Scy 308275970Scy#define bufferevent_wm_suspend_read(b) \ 309275970Scy bufferevent_suspend_read_((b), BEV_SUSPEND_WM) 310275970Scy#define bufferevent_wm_unsuspend_read(b) \ 311275970Scy bufferevent_unsuspend_read_((b), BEV_SUSPEND_WM) 312275970Scy 313275970Scy/* 314275970Scy Disable a bufferevent. Equivalent to bufferevent_disable(), but 315275970Scy first resets 'connecting' flag to force EV_WRITE down for sure. 316275970Scy 317275970Scy XXXX this method will go away in the future; try not to add new users. 318275970Scy See comment in evhttp_connection_reset_() for discussion. 319275970Scy 320275970Scy @param bufev the bufferevent to be disabled 321275970Scy @param event any combination of EV_READ | EV_WRITE. 322275970Scy @return 0 if successful, or -1 if an error occurred 323275970Scy @see bufferevent_disable() 324275970Scy */ 325275970Scyint bufferevent_disable_hard_(struct bufferevent *bufev, short event); 326275970Scy 327275970Scy/** Internal: Set up locking on a bufferevent. If lock is set, use it. 328275970Scy * Otherwise, use a new lock. */ 329275970Scyint bufferevent_enable_locking_(struct bufferevent *bufev, void *lock); 330275970Scy/** Internal: Increment the reference count on bufev. */ 331275970Scyvoid bufferevent_incref_(struct bufferevent *bufev); 332275970Scy/** Internal: Lock bufev and increase its reference count. 333275970Scy * unlocking it otherwise. */ 334275970Scyvoid bufferevent_incref_and_lock_(struct bufferevent *bufev); 335275970Scy/** Internal: Decrement the reference count on bufev. Returns 1 if it freed 336275970Scy * the bufferevent.*/ 337275970Scyint bufferevent_decref_(struct bufferevent *bufev); 338275970Scy/** Internal: Drop the reference count on bufev, freeing as necessary, and 339275970Scy * unlocking it otherwise. Returns 1 if it freed the bufferevent. */ 340275970Scyint bufferevent_decref_and_unlock_(struct bufferevent *bufev); 341275970Scy 342275970Scy/** Internal: If callbacks are deferred and we have a read callback, schedule 343275970Scy * a readcb. Otherwise just run the readcb. Ignores watermarks. */ 344275970Scyvoid bufferevent_run_readcb_(struct bufferevent *bufev, int options); 345275970Scy/** Internal: If callbacks are deferred and we have a write callback, schedule 346275970Scy * a writecb. Otherwise just run the writecb. Ignores watermarks. */ 347275970Scyvoid bufferevent_run_writecb_(struct bufferevent *bufev, int options); 348275970Scy/** Internal: If callbacks are deferred and we have an eventcb, schedule 349275970Scy * it to run with events "what". Otherwise just run the eventcb. 350275970Scy * See bufferevent_trigger_event for meaning of "options". */ 351275970Scyvoid bufferevent_run_eventcb_(struct bufferevent *bufev, short what, int options); 352275970Scy 353275970Scy/** Internal: Run or schedule (if deferred or options contain 354275970Scy * BEV_TRIG_DEFER_CALLBACKS) I/O callbacks specified in iotype. 355275970Scy * Must already hold the bufev lock. Honors watermarks unless 356275970Scy * BEV_TRIG_IGNORE_WATERMARKS is in options. */ 357275970Scystatic inline void bufferevent_trigger_nolock_(struct bufferevent *bufev, short iotype, int options); 358275970Scy 359275970Scy/* Making this inline since all of the common-case calls to this function in 360275970Scy * libevent use constant arguments. */ 361275970Scystatic inline void 362275970Scybufferevent_trigger_nolock_(struct bufferevent *bufev, short iotype, int options) 363275970Scy{ 364275970Scy if ((iotype & EV_READ) && ((options & BEV_TRIG_IGNORE_WATERMARKS) || 365275970Scy evbuffer_get_length(bufev->input) >= bufev->wm_read.low)) 366275970Scy bufferevent_run_readcb_(bufev, options); 367275970Scy if ((iotype & EV_WRITE) && ((options & BEV_TRIG_IGNORE_WATERMARKS) || 368275970Scy evbuffer_get_length(bufev->output) <= bufev->wm_write.low)) 369275970Scy bufferevent_run_writecb_(bufev, options); 370275970Scy} 371275970Scy 372275970Scy/** Internal: Add the event 'ev' with timeout tv, unless tv is set to 0, in 373275970Scy * which case add ev with no timeout. */ 374275970Scyint bufferevent_add_event_(struct event *ev, const struct timeval *tv); 375275970Scy 376275970Scy/* ========= 377275970Scy * These next functions implement timeouts for bufferevents that aren't doing 378275970Scy * anything else with ev_read and ev_write, to handle timeouts. 379275970Scy * ========= */ 380275970Scy/** Internal use: Set up the ev_read and ev_write callbacks so that 381275970Scy * the other "generic_timeout" functions will work on it. Call this from 382275970Scy * the constructor function. */ 383275970Scyvoid bufferevent_init_generic_timeout_cbs_(struct bufferevent *bev); 384275970Scy/** Internal use: Add or delete the generic timeout events as appropriate. 385275970Scy * (If an event is enabled and a timeout is set, we add the event. Otherwise 386275970Scy * we delete it.) Call this from anything that changes the timeout values, 387275970Scy * that enabled EV_READ or EV_WRITE, or that disables EV_READ or EV_WRITE. */ 388275970Scyint bufferevent_generic_adj_timeouts_(struct bufferevent *bev); 389275970Scy 390275970Scyenum bufferevent_options bufferevent_get_options_(struct bufferevent *bev); 391275970Scy 392275970Scy/** Internal use: We have just successfully read data into an inbuf, so 393275970Scy * reset the read timeout (if any). */ 394275970Scy#define BEV_RESET_GENERIC_READ_TIMEOUT(bev) \ 395275970Scy do { \ 396275970Scy if (evutil_timerisset(&(bev)->timeout_read)) \ 397275970Scy event_add(&(bev)->ev_read, &(bev)->timeout_read); \ 398275970Scy } while (0) 399275970Scy/** Internal use: We have just successfully written data from an inbuf, so 400275970Scy * reset the read timeout (if any). */ 401275970Scy#define BEV_RESET_GENERIC_WRITE_TIMEOUT(bev) \ 402275970Scy do { \ 403275970Scy if (evutil_timerisset(&(bev)->timeout_write)) \ 404275970Scy event_add(&(bev)->ev_write, &(bev)->timeout_write); \ 405275970Scy } while (0) 406275970Scy#define BEV_DEL_GENERIC_READ_TIMEOUT(bev) \ 407275970Scy event_del(&(bev)->ev_read) 408275970Scy#define BEV_DEL_GENERIC_WRITE_TIMEOUT(bev) \ 409275970Scy event_del(&(bev)->ev_write) 410275970Scy 411275970Scy 412275970Scy/** Internal: Given a bufferevent, return its corresponding 413275970Scy * bufferevent_private. */ 414275970Scy#define BEV_UPCAST(b) EVUTIL_UPCAST((b), struct bufferevent_private, bev) 415275970Scy 416275970Scy#ifdef EVENT__DISABLE_THREAD_SUPPORT 417275970Scy#define BEV_LOCK(b) EVUTIL_NIL_STMT_ 418275970Scy#define BEV_UNLOCK(b) EVUTIL_NIL_STMT_ 419275970Scy#else 420275970Scy/** Internal: Grab the lock (if any) on a bufferevent */ 421275970Scy#define BEV_LOCK(b) do { \ 422275970Scy struct bufferevent_private *locking = BEV_UPCAST(b); \ 423275970Scy EVLOCK_LOCK(locking->lock, 0); \ 424275970Scy } while (0) 425275970Scy 426275970Scy/** Internal: Release the lock (if any) on a bufferevent */ 427275970Scy#define BEV_UNLOCK(b) do { \ 428275970Scy struct bufferevent_private *locking = BEV_UPCAST(b); \ 429275970Scy EVLOCK_UNLOCK(locking->lock, 0); \ 430275970Scy } while (0) 431275970Scy#endif 432275970Scy 433275970Scy 434275970Scy/* ==== For rate-limiting. */ 435275970Scy 436275970Scyint bufferevent_decrement_write_buckets_(struct bufferevent_private *bev, 437275970Scy ev_ssize_t bytes); 438275970Scyint bufferevent_decrement_read_buckets_(struct bufferevent_private *bev, 439275970Scy ev_ssize_t bytes); 440275970Scyev_ssize_t bufferevent_get_read_max_(struct bufferevent_private *bev); 441275970Scyev_ssize_t bufferevent_get_write_max_(struct bufferevent_private *bev); 442275970Scy 443275970Scyint bufferevent_ratelim_init_(struct bufferevent_private *bev); 444275970Scy 445275970Scy#ifdef __cplusplus 446275970Scy} 447275970Scy#endif 448275970Scy 449275970Scy 450275970Scy#endif /* BUFFEREVENT_INTERNAL_H_INCLUDED_ */ 451