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TD2 I.5 first working version of Thread

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Add semaphore to PutChar and GetChar
This commit is contained in:
Yorick Barbanneau 2021-11-15 00:42:30 +01:00
parent c4a2d25163
commit 6bd3e1338f
8 changed files with 95 additions and 4 deletions
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47
code/userprog/userthread.cc
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@ -3,9 +3,56 @@
#include "system.h"
#include "userthread.h"
#include "syscall.h"
#include "addrspace.h"
static void StartUserThread( void * args ){
DEBUG('x', "Enter StartUserThread function\n");
// retrieve function and arguments
// create a ThreadArgs_t struct and cast args content into it
// because we only have a void in our function definition
ThreadArgs_t * cpy_args;
cpy_args = (ThreadArgs_t *) args;
int stack_addr = currentThread->space->AllocateUserStack();
// init register
for (int i = 0; i < NumTotalRegs; i++ ) {
machine->WriteRegister(i, 0);
}
// init Program counter and Next Program Counter registers
machine->WriteRegister(PCReg, cpy_args->f);
machine->WriteRegister (NextPCReg, machine->ReadRegister(PCReg) + 4);
DEBUG('x',"PCReg: 0x%x, NextPCReg: 0x%x\n", cpy_args->f, cpy_args->f + 4);
// init register 4: arguments
machine->WriteRegister(4, cpy_args->arg);
DEBUG('x',"Register 4: 0x%x\n", cpy_args->arg);
// init stack
machine->WriteRegister(StackReg, stack_addr);
DEBUG('x',"StackRegister: 0x%x\n", stack_addr);
// run our thread
machine->Run();
}
int do_ThreadCreate(int f, int arg){
DEBUG('x',"Enter do_ThreadCreate function\n");
// Initialize our structure we'll pass to StartUserThread
ThreadArgs_t * args = (ThreadArgs_t *) malloc(sizeof(ThreadArgs_t));
args->f = f;
args->arg = arg;
// create a new Thread and start it
Thread * newThread = new Thread("new thread");
newThread->space = currentThread->space;
newThread->Start(StartUserThread, args);
return 0;
}
void do_ThreadExit(){