// Gets value out of cache. // On entry. gCacheMutex must not be held. value must be NULL. status // must be U_ZERO_ERROR. // On exit. value and status set to what is in cache at key or on cache // miss the key's createObject() is called and value and status are set to // the result of that. In this latter case, best effort is made to add the // value and status to the cache. If createObject() fails to create a value, // gNoValue is stored in cache, and value is set to NULL. Caller must call // removeRef on value if non NULL. void UnifiedCache::_get( const CacheKeyBase &key, const SharedObject *&value, const void *creationContext, UErrorCode &status) const { U_ASSERT(value == NULL); U_ASSERT(status == U_ZERO_ERROR); if (_poll(key, value, status)) { if (value == gNoValue) { SharedObject::clearPtr(value); } return; } if (U_FAILURE(status)) { return; } value = key.createObject(creationContext, status); U_ASSERT(value == NULL || value->hasHardReferences()); U_ASSERT(value != NULL || status != U_ZERO_ERROR); if (value == NULL) { SharedObject::copyPtr(gNoValue, value); } _putIfAbsentAndGet(key, value, status); if (value == gNoValue) { SharedObject::clearPtr(value); } }
static int _loop (lw6sys_context_t * sys_context, _lw6dsp_data_t * data) { int ret = 0; if (!lw6gui_video_mode_is_same (sys_context, &(data->video_mode_requested), &(data->param.video_mode))) { data->video_mode_requested = data->param.video_mode; lw6sys_log (sys_context, LW6SYS_LOG_DEBUG, _x_ ("dsp update request %dx%d fullscreen=%d mode"), data->video_mode_requested.width, data->video_mode_requested.height, data->video_mode_requested.fullscreen); if (lw6gfx_set_video_mode (sys_context, data->gfx_backend, &(data->video_mode_requested))) { if (lw6gfx_get_video_mode (sys_context, data->gfx_backend, &(data->video_mode_obtained))) { lw6sys_log (sys_context, LW6SYS_LOG_DEBUG, _x_ ("dsp update obtained %dx%d fullscreen=%d mode"), data->video_mode_obtained.width, data->video_mode_obtained.height, data->video_mode_obtained.fullscreen); } } } ret = _poll (sys_context, data); return ret; }
int UsbMidiModule::_peek() { _poll(); u8 byte = 0; m_midiInFifo.peek(&byte); return byte; }
int UsbMidiModule::_read() { _poll(); u8 byte = 0; m_midiInFifo.pop(&byte); return byte; }
int poll(struct pollfd *fds, unsigned int nfds, int timeout) { int ret; _thread_enter_cancellation_point(); ret = _poll(fds, nfds, timeout); _thread_leave_cancellation_point(); return ret; }
/* * Interface between xdr serializer and tcp connection. * Behaves like the system calls, read & write, but keeps some error state * around for the rpc level. */ static int read_vc(void *ctp, void *buf, int len) { struct sockaddr sa; socklen_t sal; struct ct_data *ct = (struct ct_data *)ctp; struct pollfd fd; int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) + (ct->ct_wait.tv_usec / 1000)); if (len == 0) return (0); fd.fd = ct->ct_fd; fd.events = POLLIN; for (;;) { switch (_poll(&fd, 1, milliseconds)) { case 0: ct->ct_error.re_status = RPC_TIMEDOUT; return (-1); case -1: if (errno == EINTR) continue; ct->ct_error.re_status = RPC_CANTRECV; ct->ct_error.re_errno = errno; return (-1); } break; } sal = sizeof(sa); if ((_getpeername(ct->ct_fd, &sa, &sal) == 0) && (sa.sa_family == AF_LOCAL)) { len = __msgread(ct->ct_fd, buf, (size_t)len); } else { len = _read(ct->ct_fd, buf, (size_t)len); } switch (len) { case 0: /* premature eof */ ct->ct_error.re_errno = ECONNRESET; ct->ct_error.re_status = RPC_CANTRECV; len = -1; /* it's really an error */ break; case -1: ct->ct_error.re_errno = errno; ct->ct_error.re_status = RPC_CANTRECV; break; } return (len); }
int kevent_loop_start(kevent_loop_t *el) { int r = KEVENT_OK; while (!el->stop) { if (el->prepoll_handler) el->prepoll_handler(el); if (el->stop) break; r = _poll(el); el->evcounter++; } return r; }
static int _connection_main(struct skynet_context * ctx, void * ud, int type, int session, uint32_t source, const void * msg, size_t sz) { if (type == PTYPE_RESPONSE) { _poll(ud); return 0; } assert(type == PTYPE_TEXT); const char * param = (const char *)msg + 4; if (memcmp(msg, "ADD ", 4)==0) { char * endptr; int fd = strtol(param, &endptr, 10); if (endptr == NULL) { skynet_error(ctx, "[connection] Invalid ADD command from %x (session = %d)", source, session); return 0; } int addr_sz = sz - (endptr - (char *)msg); if (addr_sz <= 1) { skynet_error(ctx, "[connection] Invalid ADD command from %x (session = %d)", source, session); return 0; } char addr [addr_sz]; memcpy(addr, endptr+1, addr_sz-1); addr[addr_sz-1] = '\0'; uint32_t address = strtoul(addr+1, NULL, 16); if (address == 0) { skynet_error(ctx, "[connection] Invalid ADD command from %x (session = %d)", source, session); return 0; } _add(ud, fd, address); } else if (memcmp(msg, "DEL ", 4)==0) { char * endptr; int fd = strtol(param, &endptr, 10); if (endptr == NULL) { skynet_error(ctx, "[connection] Invalid DEL command from %x (session = %d)", source, session); return 0; } _del(ud, fd); } else { skynet_error(ctx, "[connection] Invalid command from %x (session = %d)", source, session); } return 0; }
Error PacketPeerUDPWinsock::wait() { return _poll(true); }
int UsbMidiModule::_available() { _poll(); return !m_midiInFifo.isEmpty(); }
Error PacketPeerUDPPosix::wait() { return _poll(true); }
/* * rpc_broadcast_exp() * * prog - program number * vers - version number * proc - procedure number * xargs - xdr routine for args * argsp - pointer to args * xresults - xdr routine for results * resultsp - pointer to results * eachresult - call with each result obtained * inittime - how long to wait initially * waittime - maximum time to wait * nettype - transport type */ enum clnt_stat rpc_broadcast_exp(rpcprog_t prog, rpcvers_t vers, rpcproc_t proc, xdrproc_t xargs, caddr_t argsp, xdrproc_t xresults, caddr_t resultsp, resultproc_t eachresult, int inittime, int waittime, const char *nettype) { enum clnt_stat stat = RPC_SUCCESS; /* Return status */ XDR xdr_stream; /* XDR stream */ XDR *xdrs = &xdr_stream; struct rpc_msg msg; /* RPC message */ struct timeval t; char *outbuf = NULL; /* Broadcast msg buffer */ char *inbuf = NULL; /* Reply buf */ int inlen; u_int maxbufsize = 0; AUTH *sys_auth = authunix_create_default(); u_int i; void *handle; char uaddress[1024]; /* A self imposed limit */ char *uaddrp = uaddress; int pmap_reply_flag; /* reply recvd from PORTMAP */ /* An array of all the suitable broadcast transports */ struct { int fd; /* File descriptor */ int af; int proto; struct netconfig *nconf; /* Netconfig structure */ u_int asize; /* Size of the addr buf */ u_int dsize; /* Size of the data buf */ struct sockaddr_storage raddr; /* Remote address */ broadlist_t nal; } fdlist[MAXBCAST]; struct pollfd pfd[MAXBCAST]; size_t fdlistno = 0; struct r_rpcb_rmtcallargs barg; /* Remote arguments */ struct r_rpcb_rmtcallres bres; /* Remote results */ size_t outlen; struct netconfig *nconf; int msec; int pollretval; int fds_found; #ifdef PORTMAP size_t outlen_pmap = 0; u_long port; /* Remote port number */ int pmap_flag = 0; /* UDP exists ? */ char *outbuf_pmap = NULL; struct rmtcallargs barg_pmap; /* Remote arguments */ struct rmtcallres bres_pmap; /* Remote results */ u_int udpbufsz = 0; #endif /* PORTMAP */ if (sys_auth == NULL) { return (RPC_SYSTEMERROR); } /* * initialization: create a fd, a broadcast address, and send the * request on the broadcast transport. * Listen on all of them and on replies, call the user supplied * function. */ if (nettype == NULL) nettype = "datagram_n"; if ((handle = __rpc_setconf(nettype)) == NULL) { AUTH_DESTROY(sys_auth); return (RPC_UNKNOWNPROTO); } while ((nconf = __rpc_getconf(handle)) != NULL) { int fd; struct __rpc_sockinfo si; if (nconf->nc_semantics != NC_TPI_CLTS) continue; if (fdlistno >= MAXBCAST) break; /* No more slots available */ if (!__rpc_nconf2sockinfo(nconf, &si)) continue; TAILQ_INIT(&fdlist[fdlistno].nal); if (__rpc_getbroadifs(si.si_af, si.si_proto, si.si_socktype, &fdlist[fdlistno].nal) == 0) continue; fd = _socket(si.si_af, si.si_socktype, si.si_proto); if (fd < 0) { stat = RPC_CANTSEND; continue; } fdlist[fdlistno].af = si.si_af; fdlist[fdlistno].proto = si.si_proto; fdlist[fdlistno].fd = fd; fdlist[fdlistno].nconf = nconf; fdlist[fdlistno].asize = __rpc_get_a_size(si.si_af); pfd[fdlistno].events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND; pfd[fdlistno].fd = fdlist[fdlistno].fd = fd; fdlist[fdlistno].dsize = __rpc_get_t_size(si.si_af, si.si_proto, 0); if (maxbufsize <= fdlist[fdlistno].dsize) maxbufsize = fdlist[fdlistno].dsize; #ifdef PORTMAP if (si.si_af == AF_INET && si.si_proto == IPPROTO_UDP) { udpbufsz = fdlist[fdlistno].dsize; if ((outbuf_pmap = malloc(udpbufsz)) == NULL) { _close(fd); stat = RPC_SYSTEMERROR; goto done_broad; } pmap_flag = 1; } #endif /* PORTMAP */ fdlistno++; } if (fdlistno == 0) { if (stat == RPC_SUCCESS) stat = RPC_UNKNOWNPROTO; goto done_broad; } if (maxbufsize == 0) { if (stat == RPC_SUCCESS) stat = RPC_CANTSEND; goto done_broad; } inbuf = malloc(maxbufsize); outbuf = malloc(maxbufsize); if ((inbuf == NULL) || (outbuf == NULL)) { stat = RPC_SYSTEMERROR; goto done_broad; } /* Serialize all the arguments which have to be sent */ (void) gettimeofday(&t, NULL); msg.rm_xid = __RPC_GETXID(&t); msg.rm_direction = CALL; msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; msg.rm_call.cb_prog = RPCBPROG; msg.rm_call.cb_vers = RPCBVERS; msg.rm_call.cb_proc = RPCBPROC_CALLIT; barg.prog = prog; barg.vers = vers; barg.proc = proc; barg.args.args_val = argsp; barg.xdr_args = xargs; bres.addr = uaddrp; bres.results.results_val = resultsp; bres.xdr_res = xresults; msg.rm_call.cb_cred = sys_auth->ah_cred; msg.rm_call.cb_verf = sys_auth->ah_verf; xdrmem_create(xdrs, outbuf, maxbufsize, XDR_ENCODE); if ((!xdr_callmsg(xdrs, &msg)) || (!xdr_rpcb_rmtcallargs(xdrs, (struct rpcb_rmtcallargs *)(void *)&barg))) { stat = RPC_CANTENCODEARGS; goto done_broad; } outlen = xdr_getpos(xdrs); xdr_destroy(xdrs); #ifdef PORTMAP /* Prepare the packet for version 2 PORTMAP */ if (pmap_flag) { msg.rm_xid++; /* One way to distinguish */ msg.rm_call.cb_prog = PMAPPROG; msg.rm_call.cb_vers = PMAPVERS; msg.rm_call.cb_proc = PMAPPROC_CALLIT; barg_pmap.prog = prog; barg_pmap.vers = vers; barg_pmap.proc = proc; barg_pmap.args_ptr = argsp; barg_pmap.xdr_args = xargs; bres_pmap.port_ptr = &port; bres_pmap.xdr_results = xresults; bres_pmap.results_ptr = resultsp; xdrmem_create(xdrs, outbuf_pmap, udpbufsz, XDR_ENCODE); if ((! xdr_callmsg(xdrs, &msg)) || (! xdr_rmtcall_args(xdrs, &barg_pmap))) { stat = RPC_CANTENCODEARGS; goto done_broad; } outlen_pmap = xdr_getpos(xdrs); xdr_destroy(xdrs); } #endif /* PORTMAP */ /* * Basic loop: broadcast the packets to transports which * support data packets of size such that one can encode * all the arguments. * Wait a while for response(s). * The response timeout grows larger per iteration. */ for (msec = inittime; msec <= waittime; msec += msec) { struct broadif *bip; /* Broadcast all the packets now */ for (i = 0; i < fdlistno; i++) { if (fdlist[i].dsize < outlen) { stat = RPC_CANTSEND; continue; } for (bip = TAILQ_FIRST(&fdlist[i].nal); bip != NULL; bip = TAILQ_NEXT(bip, link)) { void *addr; addr = &bip->broadaddr; __rpc_broadenable(fdlist[i].af, fdlist[i].fd, bip); /* * Only use version 3 if lowvers is not set */ if (!__rpc_lowvers) if (_sendto(fdlist[i].fd, outbuf, outlen, 0, (struct sockaddr*)addr, (size_t)fdlist[i].asize) != outlen) { #ifdef RPC_DEBUG perror("sendto"); #endif warnx("clnt_bcast: cannot send " "broadcast packet"); stat = RPC_CANTSEND; continue; } #ifdef RPC_DEBUG if (!__rpc_lowvers) fprintf(stderr, "Broadcast packet sent " "for %s\n", fdlist[i].nconf->nc_netid); #endif #ifdef PORTMAP /* * Send the version 2 packet also * for UDP/IP */ if (pmap_flag && fdlist[i].proto == IPPROTO_UDP) { if (_sendto(fdlist[i].fd, outbuf_pmap, outlen_pmap, 0, addr, (size_t)fdlist[i].asize) != outlen_pmap) { warnx("clnt_bcast: " "Cannot send broadcast packet"); stat = RPC_CANTSEND; continue; } } #ifdef RPC_DEBUG fprintf(stderr, "PMAP Broadcast packet " "sent for %s\n", fdlist[i].nconf->nc_netid); #endif #endif /* PORTMAP */ } /* End for sending all packets on this transport */ } /* End for sending on all transports */ if (eachresult == NULL) { stat = RPC_SUCCESS; goto done_broad; } /* * Get all the replies from these broadcast requests */ recv_again: switch (pollretval = _poll(pfd, fdlistno, msec)) { case 0: /* timed out */ stat = RPC_TIMEDOUT; continue; case -1: /* some kind of error - we ignore it */ goto recv_again; } /* end of poll results switch */ for (i = fds_found = 0; i < fdlistno && fds_found < pollretval; i++) { bool_t done = FALSE; if (pfd[i].revents == 0) continue; else if (pfd[i].revents & POLLNVAL) { /* * Something bad has happened to this descri- * ptor. We can cause _poll() to ignore * it simply by using a negative fd. We do that * rather than compacting the pfd[] and fdlist[] * arrays. */ pfd[i].fd = -1; fds_found++; continue; } else fds_found++; #ifdef RPC_DEBUG fprintf(stderr, "response for %s\n", fdlist[i].nconf->nc_netid); #endif try_again: inlen = _recvfrom(fdlist[i].fd, inbuf, fdlist[i].dsize, 0, (struct sockaddr *)(void *)&fdlist[i].raddr, &fdlist[i].asize); if (inlen < 0) { if (errno == EINTR) goto try_again; warnx("clnt_bcast: Cannot receive reply to " "broadcast"); stat = RPC_CANTRECV; continue; } if (inlen < sizeof (u_int32_t)) continue; /* Drop that and go ahead */ /* * see if reply transaction id matches sent id. * If so, decode the results. If return id is xid + 1 * it was a PORTMAP reply */ if (*((u_int32_t *)(void *)(inbuf)) == *((u_int32_t *)(void *)(outbuf))) { pmap_reply_flag = 0; msg.acpted_rply.ar_verf = _null_auth; msg.acpted_rply.ar_results.where = (caddr_t)(void *)&bres; msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_rpcb_rmtcallres; #ifdef PORTMAP } else if (pmap_flag && *((u_int32_t *)(void *)(inbuf)) == *((u_int32_t *)(void *)(outbuf_pmap))) { pmap_reply_flag = 1; msg.acpted_rply.ar_verf = _null_auth; msg.acpted_rply.ar_results.where = (caddr_t)(void *)&bres_pmap; msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_rmtcallres; #endif /* PORTMAP */ } else continue; xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE); if (xdr_replymsg(xdrs, &msg)) { if ((msg.rm_reply.rp_stat == MSG_ACCEPTED) && (msg.acpted_rply.ar_stat == SUCCESS)) { struct netbuf taddr, *np; struct sockaddr_in *sin; #ifdef PORTMAP if (pmap_flag && pmap_reply_flag) { sin = (struct sockaddr_in *) (void *)&fdlist[i].raddr; sin->sin_port = htons((u_short)port); taddr.len = taddr.maxlen = fdlist[i].raddr.ss_len; taddr.buf = &fdlist[i].raddr; done = (*eachresult)(resultsp, &taddr, fdlist[i].nconf); } else { #endif /* PORTMAP */ #ifdef RPC_DEBUG fprintf(stderr, "uaddr %s\n", uaddrp); #endif np = uaddr2taddr( fdlist[i].nconf, uaddrp); done = (*eachresult)(resultsp, np, fdlist[i].nconf); free(np); #ifdef PORTMAP } #endif /* PORTMAP */ } /* otherwise, we just ignore the errors ... */ } /* else some kind of deserialization problem ... */ xdrs->x_op = XDR_FREE; msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; (void) xdr_replymsg(xdrs, &msg); (void) (*xresults)(xdrs, resultsp); XDR_DESTROY(xdrs); if (done) { stat = RPC_SUCCESS; goto done_broad; } else { goto recv_again; } } /* The recv for loop */ } /* The giant for loop */ done_broad: free(inbuf); free(outbuf); #ifdef PORTMAP free(outbuf_pmap); #endif /* PORTMAP */ for (i = 0; i < fdlistno; i++) { (void)_close(fdlist[i].fd); __rpc_freebroadifs(&fdlist[i].nal); } AUTH_DESTROY(sys_auth); (void) __rpc_endconf(handle); return (stat); }
void Synchronizer::poll() { int i = 0; T_POLLFD *fds; int nfds; int ret; T_POLLFD tmp; std::deque<ReadWriteHandler *>::iterator it; std::deque<AcceptHandler *>::iterator it2; nfds = this->_acceptHandlers.size() + this->_readHandlers.size() + this->_writeHandlers.size(); fds = new T_POLLFD[nfds]; memset(fds, 0, sizeof(T_POLLFD) * nfds); i = this->construct_reads(fds, i); i = this->construct_writes(fds, i); std::cout << "Starting poll" << std::endl; ret = _poll(fds, nfds, -1); if (ret > 0) { i = 0; for (it = this->_readHandlers.begin(); it != this->_readHandlers.end(); ++i) { tmp = fds[i]; if (hasError(tmp) || isDisconnected(tmp)) { std::cout << "Client #" << (*it)->getId() << " has disconnected" << std::endl; this->_deadClients.push_front((*it)->getId()); it = this->_readHandlers.erase(it); } else if (canRead(tmp)) { (*it)->getBuffer()->setBuffLen((*it)->getSocket()->recv((*it)->getBuffer())); std::cout << "Message '" << (*it)->getBuffer()->getBuffer().buf << "' was read from client #" << (*it)->getId() << std::endl; this->_readClients.push_front(*it); it = this->_readHandlers.erase(it); } else ++it; } for (it2 = this->_acceptHandlers.begin(); it2 != this->_acceptHandlers.end(); ++i) { tmp = fds[i]; if (!hasError(tmp) && canRead(tmp)) { this->_newClients.push_front((*it2)->getSocket()->accept()); std::cout << "New Client has connected" << std::endl; it2 = this->_acceptHandlers.erase(it2); } else ++it2; } for (it = this->_writeHandlers.begin(); it != this->_writeHandlers.end(); ++i) { tmp = fds[i]; if (hasError(tmp) || isDisconnected(tmp)) { std::cout << "Client #" << (*it)->getId() << " has disconnected" << std::endl; this->_deadClients.push_front((*it)->getId()); it = this->_writeHandlers.erase(it); } else if (canWrite(tmp)) { (*it)->getSocket()->send((*it)->getBuffer()); std::cout << "Message '" << (*it)->getBuffer()->getBuffer().buf << "' was sent to client #" << (*it)->getId() << std::endl; it = this->_writeHandlers.erase(it); } else ++it; } } delete fds; }