karina
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
#include <OS/IPC.h>
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#include <OS/Scheduler.h>
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#include <Arch/CPU.h>
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#include <Arch/Exceptions.h>
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UInt64 IPCSend(OSTask* sender, UInt64 handleID, UInt64 data) {
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if (handleID == 0) return -1;
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OSProcess* currentProcess = sender->process;
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OSTask* targetTask = (OSTask*)SchedulerProcessGetHandle(currentProcess, handleID, kOSHandleTypeTask);
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if (!targetTask) return -1;
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if (targetTask->state == OSTaskStateBlockedReceive) {
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ExceptionsContext* receiverContext = (ExceptionsContext*)targetTask->stackPointer;
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receiverContext->x1 = data;
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receiverContext->x0 = currentProcess->id;
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targetTask->state = OSTaskStateRunning;
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return 0;
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}
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if (targetTask->senderWaiting != nullptr) return -2;
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targetTask->senderWaiting = sender;
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SchedulerBlockCurrentTask(OSTaskStateBlockedSend);
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return 0;
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}
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void IPCReceive(ExceptionsContext* receiverFrame) {
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OSTask* receiver = SchedulerGetCurrentTask();
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if (receiver->senderWaiting != nullptr) {
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OSTask* sender = receiver->senderWaiting;
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ExceptionsContext* senderContext = (ExceptionsContext*)sender->stackPointer;
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receiverFrame->x1 = senderContext->x1; // Data
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receiverFrame->x0 = sender->process->id; // Sender ID
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receiver->senderWaiting = nullptr;
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sender->state = OSTaskStateRunning;
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return;
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}
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SchedulerBlockCurrentTask(OSTaskStateBlockedReceive);
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}
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