237 lines
8.9 KiB
Plaintext
237 lines
8.9 KiB
Plaintext
/*
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Copyright (C) 2001 Paul Davis
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Copyright (C) 2004-2008 Grame
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "JackMachThread.h"
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#include "JackError.h"
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#ifdef MY_TARGET_OS_IPHONE
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#include "/Developer/Extras/CoreAudio/PublicUtility/CAHostTimeBase.h"
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#endif
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namespace Jack
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{
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int JackMachThread::SetThreadToPriority(jack_native_thread_t thread, UInt32 inPriority, Boolean inIsFixed, UInt64 period, UInt64 computation, UInt64 constraint)
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{
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if (inPriority == 96) {
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// REAL-TIME / TIME-CONSTRAINT THREAD
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thread_time_constraint_policy_data_t theTCPolicy;
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#ifdef MY_TARGET_OS_IPHONE
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theTCPolicy.period = CAHostTimeBase::ConvertFromNanos(period);
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theTCPolicy.computation = CAHostTimeBase::ConvertFromNanos(computation);
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theTCPolicy.constraint = CAHostTimeBase::ConvertFromNanos(constraint);
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#else
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theTCPolicy.period = AudioConvertNanosToHostTime(period);
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theTCPolicy.computation = AudioConvertNanosToHostTime(computation);
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theTCPolicy.constraint = AudioConvertNanosToHostTime(constraint);
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#endif
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theTCPolicy.preemptible = true;
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kern_return_t res = thread_policy_set(pthread_mach_thread_np(thread), THREAD_TIME_CONSTRAINT_POLICY, (thread_policy_t) &theTCPolicy, THREAD_TIME_CONSTRAINT_POLICY_COUNT);
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jack_log("JackMachThread::thread_policy_set res = %ld", res);
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return (res == KERN_SUCCESS) ? 0 : -1;
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} else {
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// OTHER THREADS
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thread_extended_policy_data_t theFixedPolicy;
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thread_precedence_policy_data_t thePrecedencePolicy;
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SInt32 relativePriority;
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// [1] SET FIXED / NOT FIXED
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theFixedPolicy.timeshare = !inIsFixed;
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thread_policy_set(pthread_mach_thread_np(thread), THREAD_EXTENDED_POLICY, (thread_policy_t)&theFixedPolicy, THREAD_EXTENDED_POLICY_COUNT);
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// [2] SET PRECEDENCE
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// N.B.: We expect that if thread A created thread B, and the program wishes to change
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// the priority of thread B, then the call to change the priority of thread B must be
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// made by thread A.
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// This assumption allows us to use pthread_self() to correctly calculate the priority
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// of the feeder thread (since precedency policy's importance is relative to the
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// spawning thread's priority.)
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relativePriority = inPriority - GetThreadSetPriority(pthread_self());
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thePrecedencePolicy.importance = relativePriority;
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kern_return_t res = thread_policy_set(pthread_mach_thread_np(thread), THREAD_PRECEDENCE_POLICY, (thread_policy_t) &thePrecedencePolicy, THREAD_PRECEDENCE_POLICY_COUNT);
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jack_log("JackMachThread::thread_policy_set res = %ld", res);
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return (res == KERN_SUCCESS) ? 0 : -1;
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}
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}
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// returns the thread's priority as it was last set by the API
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UInt32 JackMachThread::GetThreadSetPriority(jack_native_thread_t thread)
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{
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return GetThreadPriority(thread, THREAD_SET_PRIORITY);
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}
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// returns the thread's priority as it was last scheduled by the Kernel
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UInt32 JackMachThread::GetThreadScheduledPriority(jack_native_thread_t thread)
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{
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return GetThreadPriority(thread, THREAD_SCHEDULED_PRIORITY);
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}
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UInt32 JackMachThread::GetThreadPriority(jack_native_thread_t thread, int inWhichPriority)
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{
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thread_basic_info_data_t threadInfo;
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policy_info_data_t thePolicyInfo;
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unsigned int count;
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// get basic info
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count = THREAD_BASIC_INFO_COUNT;
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thread_info(pthread_mach_thread_np(thread), THREAD_BASIC_INFO, (thread_info_t)&threadInfo, &count);
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switch (threadInfo.policy) {
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case POLICY_TIMESHARE:
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count = POLICY_TIMESHARE_INFO_COUNT;
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thread_info(pthread_mach_thread_np(thread), THREAD_SCHED_TIMESHARE_INFO, (thread_info_t)&(thePolicyInfo.ts), &count);
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if (inWhichPriority == THREAD_SCHEDULED_PRIORITY) {
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return thePolicyInfo.ts.cur_priority;
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} else {
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return thePolicyInfo.ts.base_priority;
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}
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break;
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case POLICY_FIFO:
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count = POLICY_FIFO_INFO_COUNT;
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thread_info(pthread_mach_thread_np(thread), THREAD_SCHED_FIFO_INFO, (thread_info_t)&(thePolicyInfo.fifo), &count);
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if ( (thePolicyInfo.fifo.depressed) && (inWhichPriority == THREAD_SCHEDULED_PRIORITY) ) {
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return thePolicyInfo.fifo.depress_priority;
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}
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return thePolicyInfo.fifo.base_priority;
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break;
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case POLICY_RR:
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count = POLICY_RR_INFO_COUNT;
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thread_info(pthread_mach_thread_np(thread), THREAD_SCHED_RR_INFO, (thread_info_t)&(thePolicyInfo.rr), &count);
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if ( (thePolicyInfo.rr.depressed) && (inWhichPriority == THREAD_SCHEDULED_PRIORITY) ) {
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return thePolicyInfo.rr.depress_priority;
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}
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return thePolicyInfo.rr.base_priority;
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break;
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}
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return 0;
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}
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int JackMachThread::GetParams(jack_native_thread_t thread, UInt64* period, UInt64* computation, UInt64* constraint)
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{
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thread_time_constraint_policy_data_t theTCPolicy;
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mach_msg_type_number_t count = THREAD_TIME_CONSTRAINT_POLICY_COUNT;
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boolean_t get_default = false;
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kern_return_t res = thread_policy_get(pthread_mach_thread_np(thread),
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THREAD_TIME_CONSTRAINT_POLICY,
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(thread_policy_t) & theTCPolicy,
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&count,
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&get_default);
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if (res == KERN_SUCCESS) {
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#ifdef MY_TARGET_OS_IPHONE
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*period = CAHostTimeBase::ConvertToNanos(theTCPolicy.period);
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*computation = CAHostTimeBase::ConvertToNanos(theTCPolicy.computation);
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*constraint = CAHostTimeBase::ConvertToNanos(theTCPolicy.constraint);
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#else
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*period = AudioConvertHostTimeToNanos(theTCPolicy.period);
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*computation = AudioConvertHostTimeToNanos(theTCPolicy.computation);
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*constraint = AudioConvertHostTimeToNanos(theTCPolicy.constraint);
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#endif
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jack_log("JackMachThread::GetParams period = %ld computation = %ld constraint = %ld", long(*period / 1000.0f), long(*computation / 1000.0f), long(*constraint / 1000.0f));
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return 0;
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} else {
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return -1;
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}
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}
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int JackMachThread::Kill()
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{
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#if 0
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// NOTE: starting macOS 12, this code no longer works
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if (fThread != (jack_native_thread_t)NULL) { // If thread has been started
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jack_log("JackMachThread::Kill");
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mach_port_t machThread = pthread_mach_thread_np(fThread);
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int res = (thread_terminate(machThread) == KERN_SUCCESS) ? 0 : -1;
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fStatus = kIdle;
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fThread = (jack_native_thread_t)NULL;
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return res;
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} else {
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return -1;
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}
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#else
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return JackPosixThread::Kill();
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#endif
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}
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int JackMachThread::AcquireRealTime()
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{
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jack_log("JackMachThread::AcquireRealTime fPeriod = %ld fComputation = %ld fConstraint = %ld",
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long(fPeriod / 1000), long(fComputation / 1000), long(fConstraint / 1000));
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return (fThread != (jack_native_thread_t)NULL) ? AcquireRealTimeImp(fThread, fPeriod, fComputation, fConstraint) : -1;
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}
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int JackMachThread::AcquireSelfRealTime()
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{
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jack_log("JackMachThread::AcquireSelfRealTime fPeriod = %ld fComputation = %ld fConstraint = %ld",
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long(fPeriod / 1000), long(fComputation / 1000), long(fConstraint / 1000));
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return AcquireRealTimeImp(pthread_self(), fPeriod, fComputation, fConstraint);
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}
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int JackMachThread::AcquireRealTime(int priority)
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{
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fPriority = priority;
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return AcquireRealTime();
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}
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int JackMachThread::AcquireSelfRealTime(int priority)
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{
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fPriority = priority;
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return AcquireSelfRealTime();
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}
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int JackMachThread::AcquireRealTimeImp(jack_native_thread_t thread, UInt64 period, UInt64 computation, UInt64 constraint)
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{
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SetThreadToPriority(thread, 96, true, period, computation, constraint);
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return 0;
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}
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int JackMachThread::DropRealTime()
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{
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return (fThread != (jack_native_thread_t)NULL) ? DropRealTimeImp(fThread) : -1;
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}
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int JackMachThread::DropSelfRealTime()
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{
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return DropRealTimeImp(pthread_self());
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}
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int JackMachThread::DropRealTimeImp(jack_native_thread_t thread)
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{
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SetThreadToPriority(thread, 63, false, 0, 0, 0);
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return 0;
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}
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void JackMachThread::SetParams(UInt64 period, UInt64 computation, UInt64 constraint)
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{
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fPeriod = period;
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fComputation = computation;
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fConstraint = constraint;
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}
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} // end of namespace
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