pcsx2/common/src/Utilities/Linux/LnxThreads.cpp

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/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2009 PCSX2 Dev Team
*
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "../PrecompiledHeader.h"
#include "PersistentThread.h"
#include "x86emitter/tools.h"
#if !defined(__LINUX__) && !defined(__WXMAC__)
# pragma message( "LnxThreads.cpp should only be compiled by projects or makefiles targeted at Linux/Mac distros.")
#else
// Note: assuming multicore is safer because it forces the interlocked routines to use
// the LOCK prefix. The prefix works on single core CPUs fine (but is slow), but not
// having the LOCK prefix is very bad indeed.
__forceinline void Threading::Sleep( int ms )
{
usleep( 1000*ms );
}
// For use in spin/wait loops, Acts as a hint to Intel CPUs and should, in theory
// improve performance and reduce cpu power consumption.
__forceinline void Threading::SpinWait()
{
// If this doesn't compile you can just comment it out (it only serves as a
// performance hint and isn't required).
__asm__ ( "pause" );
}
__forceinline void Threading::EnableHiresScheduler()
{
// Don't know if linux has a customizable scheduler resolution like Windows (doubtful)
}
__forceinline void Threading::DisableHiresScheduler()
{
}
u64 Threading::GetThreadTicksPerSecond()
{
// Returning 0 is like saying "I'm not supported yet!"
return 0;
}
u64 Threading::GetThreadCpuTime()
{
// Get the cpu time for the current thread. Should be a measure of total time the
// thread has used on the CPU (scaled by the value returned by GetThreadTicksPerSecond(),
// which typically would be an OS-provided scalar or some sort).
return 0;
}
u64 Threading::PersistentThread::GetCpuTime() const
{
// Get the cpu time for the thread belonging to this object. Use m_native_id and/or
// m_native_handle to implement it. Return value should be a measure of total time the
// thread has used on the CPU (scaled by the value returned by GetThreadTicksPerSecond(),
// which typically would be an OS-provided scalar or some sort).
return 0;
}
void Threading::PersistentThread::_platform_specific_OnStartInThread()
{
// Obtain linux-specific thread IDs or Handles here, which can be used to query
// kernel scheduler performance information.
}
void Threading::PersistentThread::_platform_specific_OnCleanupInThread()
{
// Cleanup handles here, which were opened above.
}
void Threading::PersistentThread::_DoSetThreadName( const char* name )
{
// dunno if linux has a feature for naming threads ...?
}
#endif