3 * - By John Hodge (thePowersGang)
11 #include <threads_int.h>
16 * \fn int Proc_SendMessage(Uint *Err, Uint Dest, int Length, void *Data)
17 * \brief Send an IPC message
18 * \param Err Pointer to the errno variable
19 * \param Dest Destination Thread
20 * \param Length Length of the message
21 * \param Data Message data
23 int Proc_SendMessage(Uint *Err, Uint Dest, int Length, void *Data)
28 ENTER("pErr iDest iLength pData", Err, Dest, Length, Data);
30 if(Length <= 0 || !Data) {
36 thread = Threads_GetThread( Dest );
39 if(!thread) LEAVE_RET('i', -1);
42 SHORTLOCK( &thread->IsLocked );
44 // Check if thread is still alive
45 if(thread->Status == THREAD_STAT_DEAD) {
46 SHORTREL( &thread->IsLocked );
51 msg = malloc( sizeof(tMsg)+Length );
53 msg->Source = Proc_GetCurThread()->TID;
55 memcpy(msg->Data, Data, Length);
57 // If there are already messages
58 if(thread->LastMessage) {
59 thread->LastMessage->Next = msg;
60 thread->LastMessage = msg;
62 thread->Messages = msg;
63 thread->LastMessage = msg;
66 SHORTREL(&thread->IsLocked);
68 LOG("Waking %p (%i %s)", thread, thread->TID, thread->ThreadName);
69 Threads_Wake( thread );
75 * \fn int Proc_GetMessage(Uint *Err, Uint *Source, void *Buffer)
76 * \brief Gets a message
77 * \param Err Pointer to \a errno
78 * \param Source Where to put the source TID
79 * \param Buffer Buffer to place the message data (set to NULL to just get message length)
81 int Proc_GetMessage(Uint *Err, Uint *Source, void *Buffer)
85 tThread *cur = Proc_GetCurThread();
87 ENTER("pSource pBuffer", Source, Buffer);
89 // Check if queue has any items
95 SHORTLOCK( &cur->IsLocked );
98 *Source = cur->Messages->Source;
99 LOG("*Source = %i", *Source);
102 // Get message length
104 ret = cur->Messages->Length;
105 SHORTREL( &cur->IsLocked );
111 if(Buffer != GETMSG_IGNORE)
113 if( !CheckMem( Buffer, cur->Messages->Length ) )
115 LOG("Invalid buffer");
117 SHORTREL( &cur->IsLocked );
121 LOG("Copied to buffer");
122 memcpy(Buffer, cur->Messages->Data, cur->Messages->Length);
124 ret = cur->Messages->Length;
128 cur->Messages = cur->Messages->Next;
129 if(cur->Messages == NULL) cur->LastMessage = NULL;
131 SHORTREL( &cur->IsLocked );
133 free(tmp); // Free outside of lock