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Added a strictly increasing timer.

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This is only somewhat useful here, but will be more
useful when the general timer interface is available.
This commit is contained in:
Gregory Alexander 2003-02-14 04:22:16 +00:00
parent 3d39bc3276
commit f12a510b8b
2 changed files with 22 additions and 2 deletions
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19
bochs/pc_system.cc
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: pc_system.cc,v 1.31 2002-10-25 11:44:33 bdenney Exp $
// $Id: pc_system.cc,v 1.32 2003-02-14 04:22:16 yakovlev Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -78,6 +78,8 @@ bx_pc_system_c::bx_pc_system_c(void)
currCountdown = NullTimerInterval;
currCountdownPeriod = NullTimerInterval;
numTimers = 1; // So far, only the nullTimer.
lastTimeUsec = 0;
usecSinceLast = 0;
}
void
@ -419,6 +421,21 @@ bx_pc_system_c::timebp_handler(void* this_ptr)
}
#endif // BX_DEBUGGER
Bit64u
bx_pc_system_c::time_usec_sequential() {
Bit64u this_time_usec = time_usec();
if(this_time_usec != lastTimeUsec) {
Bit64u diff_usec = this_time_usec-lastTimeUsec;
lastTimeUsec = this_time_usec;
if(diff_usec >= usecSinceLast) {
usecSinceLast = 0;
} else {
usecSinceLast -= diff_usec;
}
}
usecSinceLast++;
return (this_time_usec+usecSinceLast);
}
Bit64u
bx_pc_system_c::time_usec() {
return (Bit64u) (((double)(Bit64s)time_ticks()) / m_ips );

5
bochs/pc_system.h
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: pc_system.h,v 1.23 2002-12-15 16:00:41 bdenney Exp $
// $Id: pc_system.h,v 1.24 2003-02-14 04:22:16 yakovlev Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -70,6 +70,8 @@ private:
Bit32u currCountdown; // Current countdown ticks value (decrements to 0).
Bit32u currCountdownPeriod; // Length of current countdown period.
Bit64u ticksTotal; // Num ticks total since start of emulator execution.
Bit64u lastTimeUsec; // Last sequentially read time in usec.
Bit64u usecSinceLast; // Number of useconds claimed since then.
// A special null timer is always inserted in the timer[0] slot. This
// make sure that at least one timer is always active, and that the
@ -137,6 +139,7 @@ public:
void activate_timer_ticks(unsigned index, Bit64u instructions,
bx_bool continuous);
Bit64u time_usec();
Bit64u time_usec_sequential();
static BX_CPP_INLINE Bit64u time_ticks() {
return bx_pc_system.ticksTotal +
Bit64u(bx_pc_system.currCountdownPeriod - bx_pc_system.currCountdown);