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/Unix/Process.inc b/lib/Support/Unix/Process.inc
index e96d37c..9ad6272 100644
--- a/lib/Support/Unix/Process.inc
+++ b/lib/Support/Unix/Process.inc
@@ -49,10 +49,7 @@
return getpid();
}
-
-unsigned
-Process::GetPageSize()
-{
+static unsigned getPageSize() {
#if defined(__CYGWIN__)
// On Cygwin, getpagesize() returns 64k but the page size for the purposes of
// memory protection and mmap() is 4k.
@@ -68,6 +65,12 @@
return static_cast<unsigned>(page_size);
}
+// 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() {
#if defined(HAVE_MALLINFO)
struct mallinfo mi;