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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ultima/ultima8/kernel/process.h"
#include "ultima/ultima8/kernel/kernel.h"
#include "ultima/ultima8/ultima8.h"
namespace Ultima {
namespace Ultima8 {
DEFINE_RUNTIME_CLASSTYPE_CODE(Process)
Process::Process(ObjId it, uint16 ty)
: _pid(0xFFFF), _flags(0), _itemNum(it), _type(ty), _result(0), _ticksPerRun(2) {
Kernel::get_instance()->assignPID(this);
if (GAME_IS_CRUSADER) {
// Default kernel ticks per run of processes in Crusader
_ticksPerRun = 1;
}
}
void Process::fail() {
_flags |= PROC_FAILED;
terminate();
}
void Process::terminate() {
if (_flags & PROC_TERMINATED)
return;
Kernel *kernel = Kernel::get_instance();
// wake up waiting processes
for (Std::vector<ProcId>::iterator i = _waiting.begin();
i != _waiting.end(); ++i) {
Process *p = kernel->getProcess(*i);
if (p)
p->wakeUp(_result);
}
_waiting.clear();
_flags |= PROC_TERMINATED;
}
void Process::wakeUp(uint32 result) {
_result = result;
_flags &= ~PROC_SUSPENDED;
Kernel::get_instance()->setNextProcess(this);
onWakeUp();
}
void Process::waitFor(ProcId pid) {
assert(pid != _pid);
if (pid) {
Kernel *kernel = Kernel::get_instance();
// add this process to waiting list of other process
Process *p = kernel->getProcess(pid);
assert(p);
if (p->getProcessFlags() & PROC_TERMINATED) {
//warning("Proc %d wait for proc %d which is already terminated", _pid, pid);
return;
}
p->_waiting.push_back(_pid);
// Note: The original games sync itemnum between processes
// here if either one is zero, but that seems to break things
// for us so we don't do it.
}
_flags |= PROC_SUSPENDED;
}
void Process::waitFor(Process *proc) {
assert(this != proc);
ProcId pid = 0;
if (proc) pid = proc->getPid();
waitFor(pid);
}
void Process::suspend() {
_flags |= PROC_SUSPENDED;
}
Common::String Process::dumpInfo() const {
Common::String info = Common::String::format(
"Process %d class %s, item %d, type %x, status ",
getPid(), GetClassType()._className, _itemNum, _type);
if (_flags & PROC_ACTIVE) info += "A";
if (_flags & PROC_SUSPENDED) info += "S";
if (_flags & PROC_TERMINATED) info += "T";
if (_flags & PROC_TERM_DEFERRED) info += "t";
if (_flags & PROC_FAILED) info += "F";
if (_flags & PROC_RUNPAUSED) info += "R";
if (_flags & PROC_TERM_DISPOSE) info += "D";
if (!_waiting.empty()) {
info += ", notify: ";
for (Std::vector<ProcId>::const_iterator i = _waiting.begin(); i != _waiting.end(); ++i) {
if (i != _waiting.begin()) info += ", ";
info += Common::String::format("%d", *i);
}
}
return info;
}
void Process::saveData(Common::WriteStream *ws) {
ws->writeUint16LE(_pid);
ws->writeUint32LE(_flags);
ws->writeUint16LE(_itemNum);
ws->writeUint16LE(_type);
ws->writeUint32LE(_result);
ws->writeUint32LE(static_cast<uint32>(_waiting.size()));
for (unsigned int i = 0; i < _waiting.size(); ++i)
ws->writeUint16LE(_waiting[i]);
}
bool Process::loadData(Common::ReadStream *rs, uint32 version) {
_pid = rs->readUint16LE();
_flags = rs->readUint32LE();
_itemNum = rs->readUint16LE();
_type = rs->readUint16LE();
_result = rs->readUint32LE();
uint32 waitcount = rs->readUint32LE();
if (waitcount > 1024*1024) {
warning("Improbable waitcount %d for proc %d. Corrupt save?", waitcount, _pid);
return false;
}
_waiting.resize(waitcount);
for (unsigned int i = 0; i < waitcount; ++i)
_waiting[i] = rs->readUint16LE();
return true;
}
bool Process::validateWaiters() const {
for (Std::vector<ProcId>::const_iterator i = _waiting.begin();
i != _waiting.end(); ++i) {
const Process *p = Kernel::get_instance()->getProcess(*i);
if (!p) {
// This can happen if a waiting process gets forcibly terminated.
warning("Invalid procid %d in waitlist for proc %d. Maybe a bug?", *i, _pid);
} else if (!p->is_suspended()) {
// This should never happen.
warning("Procid %d in waitlist for proc %d but not marked suspended", *i, _pid);
return false;
}
}
return true;
}
} // End of namespace Ultima8
} // End of namespace Ultima
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