/*
- * AcessOS Microkernel Version
+ * Acess2 Kernel
+ * - By John Hodge (thePowersGang)
+ *
* messages.c
+ * - IPC Messages
*/
+#define DEBUG 0
#include <acess.h>
#include <threads.h>
#include <threads_int.h>
#include <errno.h>
-// === IMPORTS ===
-extern tShortSpinlock glThreadListLock;
-
// === CODE ===
/**
* \fn int Proc_SendMessage(Uint *Err, Uint Dest, int Length, void *Data)
tThread *thread;
tMsg *msg;
- Log("Proc_SendMessage: (Err=%p, Dest=%i, Length=%i, Data=%p)", Err, Dest, Length, Data);
+ ENTER("pErr iDest iLength pData", Err, Dest, Length, Data);
if(Length <= 0 || !Data) {
*Err = -EINVAL;
- return -1;
+ LEAVE_RET('i', -1);
}
// Get thread
thread = Threads_GetThread( Dest );
// Error check
- if(!thread) { return -1; }
+ if(!thread) LEAVE_RET('i', -1);
// Get Spinlock
SHORTLOCK( &thread->IsLocked );
// Check if thread is still alive
if(thread->Status == THREAD_STAT_DEAD) {
SHORTREL( &thread->IsLocked );
- return -1;
+ LEAVE_RET('i', -1);
}
// Create message
SHORTREL(&thread->IsLocked);
- SHORTLOCK(&glThreadListLock);
+ LOG("Waking %p (%i %s)", thread, thread->TID, thread->ThreadName);
Threads_Wake( thread );
- SHORTREL(&glThreadListLock);
- return 0;
+ LEAVE_RET('i', 0);
}
/**
int ret;
void *tmp;
tThread *cur = Proc_GetCurThread();
+
+ ENTER("pSource pBuffer", Source, Buffer);
// Check if queue has any items
if(!cur->Messages) {
+ LEAVE('i', 0);
return 0;
}
SHORTLOCK( &cur->IsLocked );
- if(Source)
+ if(Source) {
*Source = cur->Messages->Source;
+ LOG("*Source = %i", *Source);
+ }
// Get message length
if( !Buffer ) {
ret = cur->Messages->Length;
SHORTREL( &cur->IsLocked );
+ LEAVE('i', ret);
return ret;
}
{
if( !CheckMem( Buffer, cur->Messages->Length ) )
{
+ LOG("Invalid buffer");
*Err = -EINVAL;
SHORTREL( &cur->IsLocked );
+ LEAVE('i', -1);
return -1;
}
+ LOG("Copied to buffer");
memcpy(Buffer, cur->Messages->Data, cur->Messages->Length);
}
ret = cur->Messages->Length;
// Remove from list
tmp = cur->Messages;
cur->Messages = cur->Messages->Next;
+ if(cur->Messages == NULL) cur->LastMessage = NULL;
SHORTREL( &cur->IsLocked );
free(tmp); // Free outside of lock
-
+
+ LEAVE('i', ret);
return ret;
}