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attempt at syncing pause command between instances. works somewhat

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This commit is contained in:
Arisotura
2023-02-15 18:24:24 +01:00
parent 71dac4300d
commit 8e1a647574
5 changed files with 124 additions and 2 deletions
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98
src/frontend/qt_sdl/IPC.cpp
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@ -22,6 +22,14 @@
#include <QSharedMemory>
#include "IPC.h"
#include "Config.h"
//#include "Input.h"
namespace Input
{
void ExtHotkeyPress(int id);
}
namespace IPC
@ -79,6 +87,15 @@ void Init()
Buffer->lock();
u8* data = (u8*)Buffer->data();
BufferHeader* header = (BufferHeader*)&data[0];
if (header->NumInstances == 0)
{
// initialize the FIFO
header->CommandWriteOffset = kCommandStart;
}
CommandReadOffset = header->CommandWriteOffset;
u16 mask = header->InstanceBitmask;
for (int i = 0; i < 16; i++)
{
@ -166,4 +183,85 @@ void FIFOWrite(void* buf, int len)
header->CommandWriteOffset = offset;
}
void Process()
{
Buffer->lock();
u8* data = (u8*)Buffer->data();
BufferHeader* header = (BufferHeader*)&data[0];
// check if we got new commands
while (CommandReadOffset != header->CommandWriteOffset)
{
CommandHeader cmdheader;
u8 cmddata[kMaxCommandSize];
FIFORead(&cmdheader, sizeof(cmdheader));
if ((cmdheader.Magic != 0x4D434C4D) || (cmdheader.Length > kMaxCommandSize))
{
printf("IPC: !!! COMMAND BUFFER IS FUCKED. RESETTING\n");
CommandReadOffset = header->CommandWriteOffset;
Buffer->unlock();
return;
}
if (cmdheader.Length)
FIFORead(cmddata, cmdheader.Length);
if (!(cmdheader.Recipients & (1<<InstanceID)))
continue;
// handle this command
switch (cmdheader.Command)
{
case Cmd_Pause:
Input::ExtHotkeyPress(HK_Pause);
break;
}
}
Buffer->unlock();
}
bool SendCommand(u16 recipients, u16 command, u16 len, void* cmddata)
{
Buffer->lock();
u8* data = (u8*)Buffer->data();
BufferHeader* header = (BufferHeader*)&data[0];
recipients &= header->InstanceBitmask;
recipients &= ~(1<<InstanceID);
if (!recipients)
{
Buffer->unlock();
return false;
}
if (len && cmddata==nullptr)
{
printf("IPC: ????? sending command with NULL buffer\n");
Buffer->unlock();
return false;
}
if (len > kMaxCommandSize)
{
printf("IPC: command too long\n");
Buffer->unlock();
return false;
}
CommandHeader cmdheader;
cmdheader.Magic = 0x4D434C4D;
cmdheader.SenderID = InstanceID;
cmdheader.Recipients = recipients;
cmdheader.Command = command;
cmdheader.Length = len;
FIFOWrite(&cmdheader, sizeof(cmdheader));
if (len)
FIFOWrite(cmddata, len);
Buffer->unlock();
return true;
}
}