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sceKernelMbx.cpp
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sceKernelMbx.cpp
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// Copyright (c) 2012- PPSSPP Project.
// 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, version 2.0 or later versions.
// 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 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include <map>
#include <vector>
#include "Common/Serialize/Serializer.h"
#include "Common/Serialize/SerializeFuncs.h"
#include "Common/Serialize/SerializeMap.h"
#include "Core/HLE/sceKernel.h"
#include "Core/HLE/sceKernelThread.h"
#include "Core/HLE/sceKernelMbx.h"
#include "Core/HLE/HLE.h"
#include "Core/CoreTiming.h"
#include "Core/MemMapHelpers.h"
#include "Core/Reporting.h"
#include "Core/HLE/KernelWaitHelpers.h"
#define SCE_KERNEL_MBA_THPRI 0x100
#define SCE_KERNEL_MBA_MSPRI 0x400
#define SCE_KERNEL_MBA_ATTR_KNOWN (SCE_KERNEL_MBA_THPRI | SCE_KERNEL_MBA_MSPRI)
const int PSP_MBX_ERROR_DUPLICATE_MSG = 0x800201C9;
struct MbxWaitingThread
{
SceUID threadID;
u32 packetAddr;
u64 pausedTimeout;
bool operator ==(const SceUID &otherThreadID) const
{
return threadID == otherThreadID;
}
};
void __KernelMbxTimeout(u64 userdata, int cyclesLate);
static int mbxWaitTimer = -1;
struct NativeMbx
{
SceSize_le size;
char name[KERNELOBJECT_MAX_NAME_LENGTH + 1];
SceUInt_le attr;
s32_le numWaitThreads;
s32_le numMessages;
u32_le packetListHead;
};
struct Mbx : public KernelObject
{
const char *GetName() override { return nmb.name; }
const char *GetTypeName() override { return GetStaticTypeName(); }
static const char *GetStaticTypeName() { return "Mbx"; }
static u32 GetMissingErrorCode() { return SCE_KERNEL_ERROR_UNKNOWN_MBXID; }
static int GetStaticIDType() { return SCE_KERNEL_TMID_Mbox; }
int GetIDType() const override { return SCE_KERNEL_TMID_Mbox; }
void AddWaitingThread(SceUID id, u32 addr)
{
bool inserted = false;
if (nmb.attr & SCE_KERNEL_MBA_THPRI)
{
for (auto it = waitingThreads.begin(); it != waitingThreads.end(); ++it)
{
if (__KernelGetThreadPrio(id) < __KernelGetThreadPrio(it->threadID))
{
MbxWaitingThread waiting = {id, addr};
waitingThreads.insert(it, waiting);
inserted = true;
break;
}
}
}
if (!inserted)
{
MbxWaitingThread waiting = {id, addr};
waitingThreads.push_back(waiting);
}
}
inline void AddInitialMessage(u32 ptr)
{
nmb.numMessages++;
Memory::Write_U32(ptr, ptr);
nmb.packetListHead = ptr;
}
inline void AddFirstMessage(u32 endPtr, u32 ptr)
{
nmb.numMessages++;
Memory::Write_U32(nmb.packetListHead, ptr);
Memory::Write_U32(ptr, endPtr);
nmb.packetListHead = ptr;
}
inline void AddLastMessage(u32 endPtr, u32 ptr)
{
nmb.numMessages++;
Memory::Write_U32(ptr, endPtr);
Memory::Write_U32(nmb.packetListHead, ptr);
}
inline void AddMessage(u32 beforePtr, u32 afterPtr, u32 ptr)
{
nmb.numMessages++;
Memory::Write_U32(afterPtr, ptr);
Memory::Write_U32(ptr, beforePtr);
}
int ReceiveMessage(u32 receivePtr)
{
u32 ptr = nmb.packetListHead;
// Check over the linked list and reset the head.
int c = 0;
while (true)
{
u32 next = Memory::Read_U32(nmb.packetListHead);
if (!Memory::IsValidAddress(next))
return SCE_KERNEL_ERROR_ILLEGAL_ADDR;
if (next == ptr)
{
if (nmb.packetListHead != ptr)
{
next = Memory::Read_U32(next);
Memory::Write_U32(next, nmb.packetListHead);
nmb.packetListHead = next;
break;
}
else
{
if (c < nmb.numMessages - 1)
return PSP_MBX_ERROR_DUPLICATE_MSG;
nmb.packetListHead = 0;
break;
}
}
nmb.packetListHead = next;
c++;
}
// Tell the receiver about the message.
Memory::Write_U32(ptr, receivePtr);
nmb.numMessages--;
return 0;
}
void DoState(PointerWrap &p) override
{
auto s = p.Section("Mbx", 1);
if (!s)
return;
Do(p, nmb);
MbxWaitingThread mwt = {0};
Do(p, waitingThreads, mwt);
Do(p, pausedWaits);
}
NativeMbx nmb;
std::vector<MbxWaitingThread> waitingThreads;
// Key is the callback id it was for, or if no callback, the thread id.
std::map<SceUID, MbxWaitingThread> pausedWaits;
};
void __KernelMbxBeginCallback(SceUID threadID, SceUID prevCallbackId);
void __KernelMbxEndCallback(SceUID threadID, SceUID prevCallbackId);
void __KernelMbxInit()
{
mbxWaitTimer = CoreTiming::RegisterEvent("MbxTimeout", __KernelMbxTimeout);
__KernelRegisterWaitTypeFuncs(WAITTYPE_MBX, __KernelMbxBeginCallback, __KernelMbxEndCallback);
}
void __KernelMbxDoState(PointerWrap &p)
{
auto s = p.Section("sceKernelMbx", 1);
if (!s)
return;
Do(p, mbxWaitTimer);
CoreTiming::RestoreRegisterEvent(mbxWaitTimer, "MbxTimeout", __KernelMbxTimeout);
}
KernelObject *__KernelMbxObject()
{
return new Mbx;
}
static bool __KernelUnlockMbxForThread(Mbx *m, MbxWaitingThread &th, u32 &error, int result, bool &wokeThreads)
{
if (!HLEKernel::VerifyWait(th.threadID, WAITTYPE_MBX, m->GetUID()))
return true;
u32 timeoutPtr = __KernelGetWaitTimeoutPtr(th.threadID, error);
if (timeoutPtr != 0 && mbxWaitTimer != -1)
{
// Remove any event for this thread.
s64 cyclesLeft = CoreTiming::UnscheduleEvent(mbxWaitTimer, th.threadID);
Memory::Write_U32((u32) cyclesToUs(cyclesLeft), timeoutPtr);
}
__KernelResumeThreadFromWait(th.threadID, result);
wokeThreads = true;
return true;
}
static bool __KernelUnlockMbxForThreadCheck(Mbx *m, MbxWaitingThread &waitData, u32 &error, int result, bool &wokeThreads)
{
if (m->nmb.numMessages > 0 && __KernelUnlockMbxForThread(m, waitData, error, 0, wokeThreads))
{
m->ReceiveMessage(waitData.packetAddr);
return true;
}
return false;
}
void __KernelMbxBeginCallback(SceUID threadID, SceUID prevCallbackId)
{
auto result = HLEKernel::WaitBeginCallback<Mbx, WAITTYPE_MBX, MbxWaitingThread>(threadID, prevCallbackId, mbxWaitTimer);
if (result == HLEKernel::WAIT_CB_SUCCESS)
DEBUG_LOG(SCEKERNEL, "sceKernelReceiveMbxCB: Suspending mbx wait for callback");
else if (result == HLEKernel::WAIT_CB_BAD_WAIT_DATA)
ERROR_LOG_REPORT(SCEKERNEL, "sceKernelReceiveMbxCB: wait not found to pause for callback");
else
WARN_LOG_REPORT(SCEKERNEL, "sceKernelReceiveMbxCB: beginning callback with bad wait id?");
}
void __KernelMbxEndCallback(SceUID threadID, SceUID prevCallbackId)
{
auto result = HLEKernel::WaitEndCallback<Mbx, WAITTYPE_MBX, MbxWaitingThread>(threadID, prevCallbackId, mbxWaitTimer, __KernelUnlockMbxForThreadCheck);
if (result == HLEKernel::WAIT_CB_RESUMED_WAIT)
DEBUG_LOG(SCEKERNEL, "sceKernelReceiveMbxCB: Resuming mbx wait from callback");
}
void __KernelMbxTimeout(u64 userdata, int cyclesLate)
{
SceUID threadID = (SceUID)userdata;
HLEKernel::WaitExecTimeout<Mbx, WAITTYPE_MBX>(threadID);
}
static void __KernelWaitMbx(Mbx *m, u32 timeoutPtr)
{
if (timeoutPtr == 0 || mbxWaitTimer == -1)
return;
int micro = (int) Memory::Read_U32(timeoutPtr);
// This seems to match the actual timing.
if (micro <= 2)
micro = 20;
else if (micro <= 209)
micro = 250;
// This should call __KernelMbxTimeout() later, unless we cancel it.
CoreTiming::ScheduleEvent(usToCycles(micro), mbxWaitTimer, __KernelGetCurThread());
}
static std::vector<MbxWaitingThread>::iterator __KernelMbxFindPriority(std::vector<MbxWaitingThread> &waiting)
{
_dbg_assert_msg_(!waiting.empty(), "__KernelMutexFindPriority: Trying to find best of no threads.");
std::vector<MbxWaitingThread>::iterator iter, end, best = waiting.end();
u32 best_prio = 0xFFFFFFFF;
for (iter = waiting.begin(), end = waiting.end(); iter != end; ++iter)
{
u32 iter_prio = __KernelGetThreadPrio(iter->threadID);
if (iter_prio < best_prio)
{
best = iter;
best_prio = iter_prio;
}
}
_dbg_assert_msg_(best != waiting.end(), "__KernelMutexFindPriority: Returning invalid best thread.");
return best;
}
SceUID sceKernelCreateMbx(const char *name, u32 attr, u32 optAddr)
{
if (!name)
{
WARN_LOG_REPORT(SCEKERNEL, "%08x=sceKernelCreateMbx(): invalid name", SCE_KERNEL_ERROR_ERROR);
return SCE_KERNEL_ERROR_ERROR;
}
// Accepts 0x000 - 0x0FF, 0x100 - 0x1FF, and 0x400 - 0x4FF.
if (((attr & ~SCE_KERNEL_MBA_ATTR_KNOWN) & ~0xFF) != 0)
{
WARN_LOG_REPORT(SCEKERNEL, "%08x=sceKernelCreateMbx(): invalid attr parameter: %08x", SCE_KERNEL_ERROR_ILLEGAL_ATTR, attr);
return SCE_KERNEL_ERROR_ILLEGAL_ATTR;
}
Mbx *m = new Mbx();
SceUID id = kernelObjects.Create(m);
m->nmb.size = sizeof(NativeMbx);
strncpy(m->nmb.name, name, KERNELOBJECT_MAX_NAME_LENGTH);
m->nmb.name[KERNELOBJECT_MAX_NAME_LENGTH] = 0;
m->nmb.attr = attr;
m->nmb.numWaitThreads = 0;
m->nmb.numMessages = 0;
m->nmb.packetListHead = 0;
DEBUG_LOG(SCEKERNEL, "%i=sceKernelCreateMbx(%s, %08x, %08x)", id, name, attr, optAddr);
if (optAddr != 0)
{
u32 size = Memory::Read_U32(optAddr);
if (size > 4)
WARN_LOG_REPORT(SCEKERNEL, "sceKernelCreateMbx(%s) unsupported options parameter, size = %d", name, size);
}
if ((attr & ~SCE_KERNEL_MBA_ATTR_KNOWN) != 0)
WARN_LOG_REPORT(SCEKERNEL, "sceKernelCreateMbx(%s) unsupported attr parameter: %08x", name, attr);
return id;
}
int sceKernelDeleteMbx(SceUID id)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (m)
{
DEBUG_LOG(SCEKERNEL, "sceKernelDeleteMbx(%i)", id);
bool wokeThreads = false;
for (size_t i = 0; i < m->waitingThreads.size(); i++)
__KernelUnlockMbxForThread(m, m->waitingThreads[i], error, SCE_KERNEL_ERROR_WAIT_DELETE, wokeThreads);
m->waitingThreads.clear();
if (wokeThreads)
hleReSchedule("mbx deleted");
}
else
{
ERROR_LOG(SCEKERNEL, "sceKernelDeleteMbx(%i): invalid mbx id", id);
}
return kernelObjects.Destroy<Mbx>(id);
}
int sceKernelSendMbx(SceUID id, u32 packetAddr)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (!m)
{
ERROR_LOG(SCEKERNEL, "sceKernelSendMbx(%i, %08x): invalid mbx id", id, packetAddr);
return error;
}
NativeMbxPacket *addPacket = (NativeMbxPacket*)Memory::GetPointer(packetAddr);
if (addPacket == 0)
{
ERROR_LOG(SCEKERNEL, "sceKernelSendMbx(%i, %08x): invalid packet address", id, packetAddr);
return -1;
}
// If the queue is empty, maybe someone is waiting.
// We have to check them first, they might've timed out.
if (m->nmb.numMessages == 0)
{
bool wokeThreads = false;
std::vector<MbxWaitingThread>::iterator iter;
while (!wokeThreads && !m->waitingThreads.empty())
{
if ((m->nmb.attr & SCE_KERNEL_MBA_THPRI) != 0)
iter = __KernelMbxFindPriority(m->waitingThreads);
else
iter = m->waitingThreads.begin();
MbxWaitingThread t = *iter;
__KernelUnlockMbxForThread(m, t, error, 0, wokeThreads);
m->waitingThreads.erase(iter);
if (wokeThreads)
{
DEBUG_LOG(SCEKERNEL, "sceKernelSendMbx(%i, %08x): threads waiting, resuming %d", id, packetAddr, t.threadID);
Memory::Write_U32(packetAddr, t.packetAddr);
hleReSchedule("mbx sent");
// We don't need to do anything else, finish here.
return 0;
}
}
}
DEBUG_LOG(SCEKERNEL, "sceKernelSendMbx(%i, %08x): no threads currently waiting, adding message to queue", id, packetAddr);
if (m->nmb.numMessages == 0)
m->AddInitialMessage(packetAddr);
else
{
u32 next = m->nmb.packetListHead, prev = 0;
for (int i = 0, n = m->nmb.numMessages; i < n; i++)
{
if (next == packetAddr)
return PSP_MBX_ERROR_DUPLICATE_MSG;
if (!Memory::IsValidAddress(next))
return SCE_KERNEL_ERROR_ILLEGAL_ADDR;
prev = next;
next = Memory::Read_U32(next);
}
bool inserted = false;
if (m->nmb.attr & SCE_KERNEL_MBA_MSPRI)
{
for (int i = 0, n = m->nmb.numMessages; i < n; i++)
{
auto p = PSPPointer<NativeMbxPacket>::Create(next);
if (addPacket->priority < p->priority)
{
if (i == 0)
m->AddFirstMessage(prev, packetAddr);
else
m->AddMessage(prev, next, packetAddr);
inserted = true;
break;
}
prev = next;
next = p->next;
}
}
if (!inserted)
m->AddLastMessage(prev, packetAddr);
}
return 0;
}
int sceKernelReceiveMbx(SceUID id, u32 packetAddrPtr, u32 timeoutPtr)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (!m)
{
ERROR_LOG(SCEKERNEL, "sceKernelReceiveMbx(%i, %08x, %08x): invalid mbx id", id, packetAddrPtr, timeoutPtr);
return error;
}
if (m->nmb.numMessages > 0)
{
DEBUG_LOG(SCEKERNEL, "sceKernelReceiveMbx(%i, %08x, %08x): sending first queue message", id, packetAddrPtr, timeoutPtr);
return m->ReceiveMessage(packetAddrPtr);
}
else
{
DEBUG_LOG(SCEKERNEL, "sceKernelReceiveMbx(%i, %08x, %08x): no message in queue, waiting", id, packetAddrPtr, timeoutPtr);
HLEKernel::RemoveWaitingThread(m->waitingThreads, __KernelGetCurThread());
m->AddWaitingThread(__KernelGetCurThread(), packetAddrPtr);
__KernelWaitMbx(m, timeoutPtr);
__KernelWaitCurThread(WAITTYPE_MBX, id, 0, timeoutPtr, false, "mbx waited");
return 0;
}
}
int sceKernelReceiveMbxCB(SceUID id, u32 packetAddrPtr, u32 timeoutPtr)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (!m)
{
ERROR_LOG(SCEKERNEL, "sceKernelReceiveMbxCB(%i, %08x, %08x): invalid mbx id", id, packetAddrPtr, timeoutPtr);
return error;
}
if (m->nmb.numMessages > 0)
{
DEBUG_LOG(SCEKERNEL, "sceKernelReceiveMbxCB(%i, %08x, %08x): sending first queue message", id, packetAddrPtr, timeoutPtr);
hleCheckCurrentCallbacks();
return m->ReceiveMessage(packetAddrPtr);
}
else
{
DEBUG_LOG(SCEKERNEL, "sceKernelReceiveMbxCB(%i, %08x, %08x): no message in queue, waiting", id, packetAddrPtr, timeoutPtr);
HLEKernel::RemoveWaitingThread(m->waitingThreads, __KernelGetCurThread());
m->AddWaitingThread(__KernelGetCurThread(), packetAddrPtr);
__KernelWaitMbx(m, timeoutPtr);
__KernelWaitCurThread(WAITTYPE_MBX, id, 0, timeoutPtr, true, "mbx waited");
return 0;
}
}
int sceKernelPollMbx(SceUID id, u32 packetAddrPtr)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (!m)
{
ERROR_LOG(SCEKERNEL, "sceKernelPollMbx(%i, %08x): invalid mbx id", id, packetAddrPtr);
return error;
}
if (m->nmb.numMessages > 0)
{
DEBUG_LOG(SCEKERNEL, "sceKernelPollMbx(%i, %08x): sending first queue message", id, packetAddrPtr);
return m->ReceiveMessage(packetAddrPtr);
}
else
{
DEBUG_LOG(SCEKERNEL, "SCE_KERNEL_ERROR_MBOX_NOMSG=sceKernelPollMbx(%i, %08x): no message in queue", id, packetAddrPtr);
return SCE_KERNEL_ERROR_MBOX_NOMSG;
}
}
int sceKernelCancelReceiveMbx(SceUID id, u32 numWaitingThreadsAddr)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (!m)
{
ERROR_LOG(SCEKERNEL, "sceKernelCancelReceiveMbx(%i, %08x): invalid mbx id", id, numWaitingThreadsAddr);
return error;
}
u32 count = (u32) m->waitingThreads.size();
DEBUG_LOG(SCEKERNEL, "sceKernelCancelReceiveMbx(%i, %08x): cancelling %d threads", id, numWaitingThreadsAddr, count);
bool wokeThreads = false;
for (size_t i = 0; i < m->waitingThreads.size(); i++)
__KernelUnlockMbxForThread(m, m->waitingThreads[i], error, SCE_KERNEL_ERROR_WAIT_CANCEL, wokeThreads);
m->waitingThreads.clear();
if (wokeThreads)
hleReSchedule("mbx canceled");
if (numWaitingThreadsAddr)
Memory::Write_U32(count, numWaitingThreadsAddr);
return 0;
}
int sceKernelReferMbxStatus(SceUID id, u32 infoAddr)
{
u32 error;
Mbx *m = kernelObjects.Get<Mbx>(id, error);
if (!m)
{
ERROR_LOG(SCEKERNEL, "sceKernelReferMbxStatus(%i, %08x): invalid mbx id", id, infoAddr);
return error;
}
// Should we crash the thread somehow?
if (!Memory::IsValidAddress(infoAddr))
return -1;
for (int i = 0, n = m->nmb.numMessages; i < n; ++i)
m->nmb.packetListHead = Memory::Read_U32(m->nmb.packetListHead);
HLEKernel::CleanupWaitingThreads(WAITTYPE_MBX, id, m->waitingThreads);
// For whatever reason, it won't write if the size (first member) is 0.
if (Memory::Read_U32(infoAddr) != 0)
{
m->nmb.numWaitThreads = (int) m->waitingThreads.size();
Memory::WriteStruct<NativeMbx>(infoAddr, &m->nmb);
}
return 0;
}