From 22995bd9bfc5e7f103e03066d4aa035e4294c359 Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Mon, 25 Apr 2016 10:01:37 +0100
Subject: AudioCore: CurrentRegion() -> ReadRegion(), WriteRegion()

---
 src/audio_core/hle/dsp.cpp | 44 ++++++++++++++++++++++++++------------------
 1 file changed, 26 insertions(+), 18 deletions(-)

(limited to 'src/audio_core/hle/dsp.cpp')

diff --git a/src/audio_core/hle/dsp.cpp b/src/audio_core/hle/dsp.cpp
index c89356edc..5759a5b9e 100644
--- a/src/audio_core/hle/dsp.cpp
+++ b/src/audio_core/hle/dsp.cpp
@@ -8,8 +8,32 @@
 namespace DSP {
 namespace HLE {
 
-SharedMemory g_region0;
-SharedMemory g_region1;
+std::array<SharedMemory, 2> g_regions;
+
+static size_t CurrentRegionIndex() {
+    // The region with the higher frame counter is chosen unless there is wraparound.
+    // This function only returns a 0 or 1.
+
+    if (g_regions[0].frame_counter == 0xFFFFu && g_regions[1].frame_counter != 0xFFFEu) {
+        // Wraparound has occured.
+        return 1;
+    }
+
+    if (g_regions[1].frame_counter == 0xFFFFu && g_regions[0].frame_counter != 0xFFFEu) {
+        // Wraparound has occured.
+        return 0;
+    }
+
+    return (g_regions[0].frame_counter > g_regions[1].frame_counter) ? 0 : 1;
+}
+
+static SharedMemory& ReadRegion() {
+    return g_regions[CurrentRegionIndex()];
+}
+
+static SharedMemory& WriteRegion() {
+    return g_regions[1 - CurrentRegionIndex()];
+}
 
 void Init() {
     DSP::HLE::ResetPipes();
@@ -22,21 +46,5 @@ bool Tick() {
     return true;
 }
 
-SharedMemory& CurrentRegion() {
-    // The region with the higher frame counter is chosen unless there is wraparound.
-
-    if (g_region0.frame_counter == 0xFFFFu && g_region1.frame_counter != 0xFFFEu) {
-        // Wraparound has occured.
-        return g_region1;
-    }
-
-    if (g_region1.frame_counter == 0xFFFFu && g_region0.frame_counter != 0xFFFEu) {
-        // Wraparound has occured.
-        return g_region0;
-    }
-
-    return (g_region0.frame_counter > g_region1.frame_counter) ? g_region0 : g_region1;
-}
-
 } // namespace HLE
 } // namespace DSP
-- 
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