Event bringup

nx/include/switch/kernel/event.h

@@ -0,0 +1,18 @@
+// Copyright plutoo 2018
+#include "../types.h"
+#include "../result.h"
+#include "../kernel/svc.h"
+
+typedef struct {
+    Handle revent;
+    Handle wevent;
+} Event;
+
+Result eventCreate(Event* t);
+void   eventLoadRemote(Event* t, Handle handle);
+void   eventClose(Event* t);
+
+Result eventWait(Event* t, u64 timeout);
+Result eventFire(Event* t);
+Result eventClear(Event* t);
+

nx/include/switch/kernel/svc.h

@@ -216,6 +216,13 @@ Result svcSleepThread(u64 nano);
 ///@name Synchronization
 ///@{
 
+/**
+ * @brief Signals an event.
+ * @return Result code.
+ * @note Syscall number 0x11.
+ */
+Result svcSignalEvent(Handle handle);
+
 /**
  * @brief Clears an event's signalled status.
  * @return Result code.

nx/source/kernel/event.c

@@ -0,0 +1,62 @@
+// Copyright plutoo 2018
+#include "types.h"
+#include "result.h"
+#include "kernel/svc.h"
+#include "kernel/event.h"
+
+Result eventCreate(Event* t)
+{
+    Result rc;
+
+    rc = svcCreateEvent(&t->revent, &t->wevent);
+
+    if (R_FAILED(rc)) {
+        t->revent = INVALID_HANDLE;
+        t->wevent = INVALID_HANDLE;
+    }
+
+    return rc;
+}
+
+void eventLoadRemote(Event* t, Handle handle) {
+    t->revent = handle;
+}
+
+Result eventWait(Event* t, u64 timeout)
+{
+    Result rc;
+
+    rc = svcWaitSynchronizationSingle(t->revent, timeout);
+
+    if (R_SUCCEEDED(rc)) {
+        rc = svcResetSignal(t->revent);
+    }
+
+    return rc;
+}
+
+Result eventFire(Event* t) {
+    return svcSignalEvent(t->wevent);
+}
+
+Result eventClear(Event* t)
+{
+    if (t->wevent != INVALID_HANDLE)
+        return svcClearEvent(t->wevent);
+
+    if (t->revent != INVALID_HANDLE)
+        return svcClearEvent(t->revent);
+
+    return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+}
+
+void eventClose(Event* t)
+{
+    if (t->revent != INVALID_HANDLE)
+        svcCloseHandle(t->revent);
+    if (t->wevent != INVALID_HANDLE)
+        svcCloseHandle(t->wevent);
+
+    t->revent = INVALID_HANDLE;
+    t->wevent = INVALID_HANDLE;
+}

nx/source/kernel/svc.s

@@ -75,6 +75,11 @@ SVC_BEGIN svcSleepThread
 	ret
 SVC_END
 
+SVC_BEGIN svcSignalEvent
+	svc 0x11
+	ret
+SVC_END
+
 SVC_BEGIN svcClearEvent
 	svc 0x12
 	ret
@@ -215,6 +220,16 @@ SVC_BEGIN svcReplyAndReceive
 	ret
 SVC_END
 
+SVC_BEGIN svcCreateEvent
+    stp x0, x1, [sp, #-16]!
+    svc 0x45
+    ldr x3, [sp], #8
+    str w1, [x3]
+    ldr x3, [sp], #8
+    str w2, [x3]
+    ret
+SVC_END
+
 SVC_BEGIN svcCreateJitMemory
 	str x0, [sp, #-16]!
 	svc 0x4B