Intermediate changes

1 files changed, 47 insertions, 0 deletions

diff --git a/contrib/deprecated/galloc/internal_spinlock.h b/contrib/deprecated/galloc/internal_spinlock.h
new file mode 100644
index 0000000000..e7086f2da2
--- /dev/null
+++ b/contrib/deprecated/galloc/internal_spinlock.h
@@ -0,0 +1,47 @@
+#pragma once
+
+extern "C" {
+    #include "hack.h"
+    #include "spinlock.h"
+}
+
+#define SPINLOCK_INITIALIZER { _SPINLOCK_INITIALIZER }
+
+struct TCMalloc_SpinLock {
+    volatile spinlock_t private_lockword_;
+
+    inline void Init() noexcept {
+        private_lockword_ = _SPINLOCK_INITIALIZER;
+    }
+
+    inline void Finalize() noexcept {
+    }
+
+    inline void Lock() noexcept {
+        _SPINLOCK(&private_lockword_);
+    }
+
+    inline void Unlock() noexcept {
+        _SPINUNLOCK(&private_lockword_);
+    }
+};
+
+class TCMalloc_SpinLockHolder {
+    private:
+        TCMalloc_SpinLock* lock_;
+
+    public:
+        inline explicit TCMalloc_SpinLockHolder(TCMalloc_SpinLock* l)
+            : lock_(l)
+        {
+            l->Lock();
+        }
+
+        inline ~TCMalloc_SpinLockHolder() {
+            lock_->Unlock();
+        }
+};
+
+// Short-hands for convenient use by tcmalloc.cc
+typedef TCMalloc_SpinLock SpinLock;
+typedef TCMalloc_SpinLockHolder SpinLockHolder;