Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-10-07 09:25:34 +03:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

schedule.c: make yield() actually yield again, rather than be a synonym for spin() [Alex Jackson]

Browse Source
This commit is contained in:
Alex W. Jackson 2014-07-04 12:26:09 +00:00
parent c96e0ca32a
commit 4c148ffb50
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/emu/schedule.c
View File

@ -415,7 +415,7 @@ void device_scheduler::timeslice()
bool call_debugger = ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0);
// build the execution list if we don't have one yet
if (m_execute_list == NULL)
if (UNEXPECTED(m_execute_list == NULL))
rebuild_execute_list();
// if the current quantum has expired, find a new one
@ -439,11 +439,12 @@ void device_scheduler::timeslice()
if (m_suspend_changes_pending)
apply_suspend_changes();
// loop over non-suspended CPUs
// loop over all CPUs
for (device_execute_interface *exec = m_execute_list; exec != NULL; exec = exec->m_nextexec)
{
// only process if our target is later than the CPU's current time (coarse check)
if (target.seconds >= exec->m_localtime.seconds)
// only process if this CPU is executing or truly halted (not yielding)
// and if our target is later than the CPU's current time (coarse check)
if (EXPECTED((exec->m_suspend == 0 || exec->m_eatcycles) && target.seconds >= exec->m_localtime.seconds))
{
// compute how many attoseconds to execute this CPU
attoseconds_t delta = target.attoseconds - exec->m_localtime.attoseconds;