From b7a8cace34551eef286acd761c9b8e5de1747894 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 5 Oct 2017 09:50:18 -0700
Subject: Add abseil to core, use it for InlinedVector

---
 src/core/lib/support/memory.h | 41 +++++++++++++++++++++++++++++++++++++++++
 src/core/lib/support/vector.h | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 src/core/lib/support/vector.h

(limited to 'src/core/lib/support')

diff --git a/src/core/lib/support/memory.h b/src/core/lib/support/memory.h
index dc3d32e1c2..6b336681db 100644
--- a/src/core/lib/support/memory.h
+++ b/src/core/lib/support/memory.h
@@ -21,6 +21,7 @@
 
 #include <grpc/support/alloc.h>
 
+#include <limits>
 #include <memory>
 #include <utility>
 
@@ -54,6 +55,46 @@ inline UniquePtr<T> MakeUnique(Args&&... args) {
   return UniquePtr<T>(New<T>(std::forward<Args>(args)...));
 }
 
+// an allocator that uses gpr_malloc/gpr_free
+template <class T>
+class Allocator {
+ public:
+  typedef T value_type;
+  typedef T* pointer;
+  typedef const T* const_pointer;
+  typedef T& reference;
+  typedef const T& const_reference;
+  typedef std::size_t size_type;
+  typedef std::ptrdiff_t difference_type;
+  typedef std::false_type propagate_on_container_move_assignment;
+  template <class U>
+  struct rebind {
+    typedef Allocator<U> other;
+  };
+  typedef std::true_type is_always_equal;
+
+  pointer address(reference x) const { return &x; }
+  const_pointer address(const_reference x) const { return &x; }
+  pointer allocate(std::size_t n,
+                   std::allocator<void>::const_pointer hint = 0) {
+    return static_cast<pointer>(gpr_malloc(n * sizeof(T)));
+  }
+  void deallocate(T* p, std::size_t n) { gpr_free(p); }
+  size_t max_size() const {
+    return std::numeric_limits<size_type>::max() / sizeof(value_type);
+  }
+  void construct(pointer p, const_reference val) { new ((void*)p) T(val); }
+  template <class U, class... Args>
+  void construct(U* p, Args&&... args) {
+    ::new ((void*)p) U(std::forward<Args>(args)...);
+  }
+  void destroy(pointer p) { p->~T(); }
+  template <class U>
+  void destroy(U* p) {
+    p->~U();
+  }
+};
+
 }  // namespace grpc_core
 
 #endif /* GRPC_CORE_LIB_SUPPORT_MEMORY_H */
diff --git a/src/core/lib/support/vector.h b/src/core/lib/support/vector.h
new file mode 100644
index 0000000000..4a7db80676
--- /dev/null
+++ b/src/core/lib/support/vector.h
@@ -0,0 +1,32 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_SUPPORT_VECTOR_H
+#define GRPC_CORE_LIB_SUPPORT_VECTOR_H
+
+#include "absl/container/inlined_vector.h"
+#include "src/core/lib/support/memory.h"
+
+namespace grpc_core {
+
+template <typename T, size_t N>
+using InlinedVector = absl::InlinedVector<T, N, Allocator<T>>;
+
+}  // namespace grpc_core
+
+#endif
-- 
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