+++ /dev/null
-/*
- * AcessOS Microkernel Version
- * messages.c
- */
-#include <common.h>
-#include <proc.h>
-#include <errno.h>
-
-// === CODE ===
-/**
- * \fn int Proc_SendMessage(Uint *Err, Uint Dest, int Length, void *Data)
- * \brief Send an IPC message
- * \param Err Pointer to the errno variable
- * \param Dest Destination Thread
- * \param Length Length of the message
- * \param Data Message data
- */
-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);
-
- if(Length <= 0 || !Data) {
- *Err = -EINVAL;
- return -1;
- }
-
- // Get thread
- thread = Threads_GetThread( Dest );
-
- // Error check
- if(!thread) { return -1; }
-
- // Get Spinlock
- LOCK( &thread->IsLocked );
-
- // Check if thread is still alive
- if(thread->Status == THREAD_STAT_DEAD) return -1;
-
- // Create message
- msg = malloc( sizeof(tMsg)+Length );
- msg->Next = NULL;
- msg->Source = Proc_GetCurThread()->TID;
- msg->Length = Length;
- memcpy(msg->Data, Data, Length);
-
- // If there are already messages
- if(thread->LastMessage) {
- thread->LastMessage->Next = msg;
- thread->LastMessage = msg;
- } else {
- thread->Messages = msg;
- thread->LastMessage = msg;
- }
-
- RELEASE(&thread->IsLocked);
-
- Threads_Wake( thread );
-
- return 0;
-}
-
-/**
- * \fn int Proc_GetMessage(Uint *Err, Uint *Source, void *Buffer)
- * \brief Gets a message
- * \param Err Pointer to \a errno
- * \param Source Where to put the source TID
- * \param Buffer Buffer to place the message data (set to NULL to just get message length)
- */
-int Proc_GetMessage(Uint *Err, Uint *Source, void *Buffer)
-{
- int ret;
- void *tmp;
- tThread *cur = Proc_GetCurThread();
-
- // Check if queue has any items
- if(!cur->Messages) {
- return 0;
- }
-
- LOCK( &cur->IsLocked );
-
- if(Source)
- *Source = cur->Messages->Source;
-
- // Get message length
- if( !Buffer ) {
- ret = cur->Messages->Length;
- RELEASE( &cur->IsLocked );
- return ret;
- }
-
- // Get message
- if(Buffer != GETMSG_IGNORE)
- memcpy(Buffer, cur->Messages->Data, cur->Messages->Length);
- ret = cur->Messages->Length;
-
- // Remove from list
- tmp = cur->Messages->Next;
- free(cur->Messages);
- cur->Messages = tmp;
-
- RELEASE( &cur->IsLocked );
-
- return ret;
-}