1 /* 2 * Copyright (c) 2003-2004, Marcus Overhagen <marcus@overhagen.de> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * * Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 18 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 #include "debug.h" 26 #include "SystemTimeSource.h" 27 28 29 SystemTimeSource::SystemTimeSource() 30 : BMediaNode("System clock"), 31 BTimeSource(), 32 fControlThread(-1) 33 { 34 TRACE("SystemTimeSource::SystemTimeSource\n"); 35 } 36 37 SystemTimeSource::~SystemTimeSource() 38 { 39 TRACE("SystemTimeSource::~SystemTimeSource enter\n"); 40 41 close_port(ControlPort()); 42 if (fControlThread != -1) { 43 status_t err; 44 wait_for_thread(fControlThread, &err); 45 } 46 TRACE("SystemTimeSource::~SystemTimeSource exit\n"); 47 } 48 49 BMediaAddOn* 50 SystemTimeSource::AddOn(int32 * internal_id) const 51 { 52 return NULL; 53 } 54 55 status_t 56 SystemTimeSource::TimeSourceOp(const time_source_op_info & op, void * _reserved) 57 { 58 TRACE("######## SystemTimeSource::TimeSourceOp\n"); 59 bigtime_t real = RealTime(); 60 PublishTime(real, real, 1.0); 61 return B_OK; 62 } 63 64 65 /* virtual */ void 66 SystemTimeSource::NodeRegistered() 67 { 68 ASSERT(fControlThread == -1); 69 fControlThread = spawn_thread(_ControlThreadStart, "System clock control", 12, this); 70 resume_thread(fControlThread); 71 } 72 73 int32 74 SystemTimeSource::_ControlThreadStart(void *arg) 75 { 76 reinterpret_cast<SystemTimeSource *>(arg)->ControlThread(); 77 return 0; 78 } 79 80 void 81 SystemTimeSource::ControlThread() 82 { 83 TRACE("SystemTimeSource::ControlThread() enter\n"); 84 status_t err; 85 do { 86 err = WaitForMessage(B_INFINITE_TIMEOUT); 87 } while (err == B_OK || err == B_ERROR); 88 TRACE("SystemTimeSource::ControlThread() exit\n"); 89 } 90