VideoCommon: Abort texture prefetching on low RAM

There is no nice way to correctly "detect" the "used" memory, so we just say
we're fine to use 50% of the physical memory for custom textures.

This will fix out-of-memory crashes, but we still might run into swapping issues.

1 files changed, 29 insertions, 0 deletions

diff --git a/Source/Core/Common/MemoryUtil.cpp b/Source/Core/Common/MemoryUtil.cpp
index db60a475ed..36de6b23a0 100644
--- a/Source/Core/Common/MemoryUtil.cpp
+++ b/Source/Core/Common/MemoryUtil.cpp
@@ -19,6 +19,12 @@
 #else
 #include <stdio.h>
 #include <sys/mman.h>
+#include <sys/types.h>
+#ifdef __APPLE__
+#include <sys/sysctl.h>
+#else
+#include <sys/sysinfo.h>
+#endif
 #endif
 
 // Valgrind doesn't support MAP_32BIT.
@@ -241,3 +247,26 @@ std::string MemUsage()
 	return "";
 #endif
 }
+
+
+size_t MemPhysical()
+{
+#ifdef _WIN32
+	MEMORYSTATUSEX memInfo;
+	memInfo.dwLength = sizeof(MEMORYSTATUSEX);
+	GlobalMemoryStatusEx(&memInfo);
+	return memInfo.ullTotalPhys;
+#elif defined(__APPLE__)
+	int mib[2];
+	size_t physical_memory;
+	mib[0] = CTL_HW;
+	mib[1] = HW_MEMSIZE;
+	size_t length = sizeof(size_t);
+	sysctl(mib, 2, &physical_memory, &length, NULL, 0);
+	return physical_memory;
+#else
+	struct sysinfo memInfo;
+	sysinfo (&memInfo);
+	return (size_t)memInfo.totalram * memInfo.mem_unit;
+#endif
+}