[Mesa-dev] [PATCH 10/19] auxiliary/os: introduce os_get_total_physical_memory helper function
Emil Velikov
emil.l.velikov at gmail.com
Thu Aug 14 15:18:19 PDT 2014
Cc: Alexander von Gluck IV <kallisti5 at unixzen.com>
Signed-off-by: Emil Velikov <emil.l.velikov at gmail.com>
---
src/gallium/auxiliary/os/os_misc.c | 64 ++++++++++++++++++++++++++++++++++++++
src/gallium/auxiliary/os/os_misc.h | 7 +++++
2 files changed, 71 insertions(+)
diff --git a/src/gallium/auxiliary/os/os_misc.c b/src/gallium/auxiliary/os/os_misc.c
index 447e720..3846a9a 100644
--- a/src/gallium/auxiliary/os/os_misc.c
+++ b/src/gallium/auxiliary/os/os_misc.c
@@ -47,6 +47,19 @@
#endif
+#if defined(PIPE_OS_LINUX)
+# include <unistd.h>
+#elif defined(PIPE_OS_APPLE) || defined(PIPE_OS_BSD)
+# include <sys/sysctl.h>
+#elif defined(PIPE_OS_HAIKU)
+# include <kernel/OS.h>
+#elif defined(PIPE_OS_WINDOWS)
+# include <windows.h>
+#else
+#error unexpected platform in os_sysinfo.c
+#endif
+
+
void
os_log_message(const char *message)
{
@@ -89,3 +102,54 @@ os_get_option(const char *name)
return getenv(name);
}
+
+/**
+ * Return the size of the total physical memory.
+ * \param size returns the size of the total physical memory
+ * \return true for success, or false on failure
+ */
+bool
+os_get_total_physical_memory(uint64_t *size)
+{
+#if defined(PIPE_OS_LINUX)
+ const long phys_pages = sysconf(_SC_PHYS_PAGES);
+ const long page_size = sysconf(_SC_PAGE_SIZE);
+
+ *size = phys_pages * page_size;
+ return (phys_pages > 0 && page_size > 0);
+#elif defined(PIPE_OS_APPLE) || defined(PIPE_OS_BSD)
+ size_t len = sizeof(size);
+ int mib[2];
+
+ mib[0] = CTL_HW;
+#if defined(PIPE_OS_APPLE)
+ mib[1] = HW_MEMSIZE;
+#elif defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)
+ mib[1] = HW_PHYSMEM64;
+#elif defined(PIPE_OS_FREEBSD)
+ mib[1] = HW_REALMEM;
+#else
+#error Unsupported *BSD
+#endif
+
+ return (sysctl(mib, 2, &size, &len, NULL, 0) == 0);
+#elif defined(PIPE_OS_HAIKU)
+ system_info info;
+ status_t ret;
+
+ ret = get_system_info(&info);
+ *size = info.max_pages * B_PAGE_SIZE;
+ return (ret == B_OK);
+#elif defined(PIPE_OS_WINDOWS)
+ MEMORYSTATUSEX status;
+ BOOL ret;
+
+ status.dwLength = sizeof(status);
+ ret = GlobalMemoryStatusEx(&status);
+ *size = status.ullTotalPhys;
+ return (ret == TRUE);
+#else
+#error unexpected platform in os_sysinfo.c
+ return false;
+#endif
+}
diff --git a/src/gallium/auxiliary/os/os_misc.h b/src/gallium/auxiliary/os/os_misc.h
index 582931f..403c8ee 100644
--- a/src/gallium/auxiliary/os/os_misc.h
+++ b/src/gallium/auxiliary/os/os_misc.h
@@ -87,6 +87,13 @@ const char *
os_get_option(const char *name);
+/*
+ * Get the total amount of physical memory available on the system.
+ */
+bool
+os_get_total_physical_memory(uint64_t *size);
+
+
#ifdef __cplusplus
}
#endif
--
2.0.2
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