Flesh out a page size accessor in the new API.
Implement the old API in terms of the new one. This simplifies the
implementation on Windows which can now re-use the self_process's once
initialization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171330 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Windows/Process.inc b/lib/Support/Windows/Process.inc
index d3a0c94..9eb611b 100644
--- a/lib/Support/Windows/Process.inc
+++ b/lib/Support/Windows/Process.inc
@@ -43,11 +43,9 @@
return GetCurrentProcess();
}
-
// This function retrieves the page size using GetSystemInfo and is present
-// solely so it can be called once in Process::GetPageSize to initialize the
-// static variable PageSize.
-inline unsigned GetPageSizeOnce() {
+// solely so it can be called once to initialize the self_process member below.
+static unsigned getPageSize() {
// NOTE: A 32-bit application running under WOW64 is supposed to use
// GetNativeSystemInfo. However, this interface is not present prior
// to Windows XP so to use it requires dynamic linking. It is not clear
@@ -58,12 +56,12 @@
return static_cast<unsigned>(info.dwPageSize);
}
-unsigned
-Process::GetPageSize() {
- static const unsigned PageSize = GetPageSizeOnce();
- return PageSize;
+// This constructor guaranteed to be run exactly once on a single thread, and
+// sets up various process invariants that can be queried cheaply from then on.
+self_process::self_process() : PageSize(getPageSize()) {
}
+
size_t
Process::GetMallocUsage()
{