Replace use of oslInterlockedCount with std::atomic

The assumption in using std::size_t is that every acquisition can be associated
with a unique memory location in the local address space, so the counter cannot
overflow.

Change-Id: I0d004a81d9bf52cf07d13481d9024fcc10b6db6d
Reviewed-on: https://gerrit.libreoffice.org/41580Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

binaryurp/source/proxy.cxx

@@ -76,13 +76,13 @@ Proxy::Proxy(
 
 
 void Proxy::do_acquire() {
-    if (osl_atomic_increment(&references_) == 1) {
+    if (++references_ == 1) {
         bridge_->resurrectProxy(*this);
     }
 }
 
 void Proxy::do_release() {
-    if (osl_atomic_decrement(&references_) == 0) {
+    if (--references_ == 0) {
         bridge_->revokeProxy(*this);
     }
 }

binaryurp/source/proxy.hxx

@@ -22,7 +22,9 @@
 
 #include "sal/config.h"
 
-#include "osl/interlck.h"
+#include <atomic>
+#include <cstddef>
+
 #include "rtl/ref.hxx"
 #include "rtl/ustring.hxx"
 #include "typelib/typedescription.h"
@@ -78,7 +80,7 @@ private:
     rtl::Reference< Bridge > bridge_;
     OUString oid_;
     com::sun::star::uno::TypeDescription type_;
-    oslInterlockedCount references_;
+    std::atomic<std::size_t> references_;
 };
 
 }