From 37575eae654c1cbcf63724107a77a03ffc114e5a Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Fri, 12 Oct 2018 21:52:16 -0400
Subject: memory_manager: Add a method for querying the end of a mapped GPU
 region.

---
 src/video_core/memory_manager.cpp | 10 ++++++++++
 src/video_core/memory_manager.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp
index ca923d17d..022d4ab74 100644
--- a/src/video_core/memory_manager.cpp
+++ b/src/video_core/memory_manager.cpp
@@ -87,6 +87,16 @@ GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) {
     return gpu_addr;
 }
 
+GPUVAddr MemoryManager::GetRegionEnd(GPUVAddr region_start) const {
+    for (const auto& region : mapped_regions) {
+        const GPUVAddr region_end{region.gpu_addr + region.size};
+        if (region_start >= region.gpu_addr && region_start < region_end) {
+            return region_end;
+        }
+    }
+    return {};
+}
+
 boost::optional<GPUVAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
     GPUVAddr gpu_addr = 0;
     u64 free_space = 0;
diff --git a/src/video_core/memory_manager.h b/src/video_core/memory_manager.h
index 86765e72a..caf80093f 100644
--- a/src/video_core/memory_manager.h
+++ b/src/video_core/memory_manager.h
@@ -26,6 +26,7 @@ public:
     GPUVAddr MapBufferEx(VAddr cpu_addr, u64 size);
     GPUVAddr MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size);
     GPUVAddr UnmapBuffer(GPUVAddr gpu_addr, u64 size);
+    GPUVAddr GetRegionEnd(GPUVAddr region_start) const;
     boost::optional<VAddr> GpuToCpuAddress(GPUVAddr gpu_addr);
     std::vector<GPUVAddr> CpuToGpuAddress(VAddr cpu_addr) const;
 
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