util/os_misc: add os_get_available_system_memory()

[mesa.git] / src / util / os_misc.c

diff --git a/src/util/os_misc.c b/src/util/os_misc.c
index e6894731b635b754e028b4ac49b2da8769607a0c..954900e3c5d7dd4ceaf5497c2d7e9eb5c15db755 100644 (file)
--- a/src/util/os_misc.c
+++ b/src/util/os_misc.c
@@ -27,6 +27,7 @@
 
 
 #include "os_misc.h"
+#include "os_file.h"
 
 #include <stdarg.h>
 
@@ -44,6 +45,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
 
 #endif
 
@@ -182,3 +185,31 @@ os_get_total_physical_memory(uint64_t *size)
    return false;
 #endif
 }
+
+bool
+os_get_available_system_memory(uint64_t *size)
+{
+#if DETECT_OS_LINUX
+   char *meminfo = os_read_file("/proc/meminfo", NULL);
+   if (!meminfo)
+      return false;
+
+   char *str = strstr(meminfo, "MemAvailable:");
+   if (!str) {
+      free(meminfo);
+      return false;
+   }
+
+   uint64_t kb_mem_available;
+   if (sscanf(str, "MemAvailable: %" PRIx64, &kb_mem_available) == 1) {
+      free(meminfo);
+      *size = kb_mem_available << 10;
+      return true;
+   }
+
+   free(meminfo);
+   return false;
+#else
+   return false;
+#endif
+}