1 files changed, 55 insertions, 0 deletions
diff --git a/src/kernel/ipc/request.c b/src/kernel/ipc/request.c
new file mode 100644
index 0000000..51a0bbc
--- /dev/null
+++ b/src/kernel/ipc/request.c
@@ -0,0 +1,55 @@
+#include "request.h"
+
+int request_get(int obj, uint32_t ptr, int wait) {
+	//check if we own the object, if not return -2
+	//check if a request is pending. if request is being processed, return -3
+	//if not (busymutex unlocked or request==0) && wait, then wait, else return -1
+	//if request pending, write it to ptr
+	// if request is nonblocking and no shm is to be mapped, delete it and unlock objects busymutex
+	//return 0
+}
+
+int request_has(int obj) {
+	//check if we own the object, if not return -2
+	//check if a request is pending.
+	// if being processed, return 2
+	// if waiting for ack, return 1
+	// if none (busymutex unlocked or request==0), return 0
+}
+
+void request_answer(int obj, uint32_t answer) {
+	//check if we own the object, if not return
+	//if no blocking request is being processed (including non-acknowledged waiting requests), return
+	//set blocking request to finished, and set its answer
+	//dereference request from object, unlock objects busymutex
+}
+
+int request_mapShm(int obj, uint32_t pos, int number) {
+	//check if we own the object, if not return -2
+	//if no request is being processes (including non-acknowledged waiting requests), return -3
+	//check if the requests has shm in parameter [number], if not return -4
+	//map shm to position
+	//if request is nonblocking and no more shm is to be mapped, delete request and free object busymutex
+	//return 0
+}
+
+static struct request *mkrequest(int obj, struct thread *requester,
+		uint32_t func, uint32_t a, uint32_t b, uint32_t c) {
+	// get object from descriptor id, if none return 0
+	// waitlock object's busy mutex
+	// if object cannot answer (owner == 0) return 0
+	// create request, fill it up, reference it from object
+	// return request	
+}
+
+int request(int obj, uint32_t func, uint32_t a, uint32_t b, uint32_t c, uint32_t answerptr) {
+	//call mkrequest with parameters (requester thread = current thread)
+	//if returned value is 0, return -1
+	//sleep until request is handled
+	//write answer to *answerptr, delete request, return 0
+}
+
+int send_msg(int obj, uint32_t func, uint32_t a, uint32_t b, uint32_t c) {
+	//call mkrequest with parameters (requester thread = 0)
+	//if returned value is 0, return -1 else return 0
+}