summaryrefslogtreecommitdiffstats
path: root/xpcom/glue/nsPointerHashKeys.h
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /xpcom/glue/nsPointerHashKeys.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'xpcom/glue/nsPointerHashKeys.h')
-rw-r--r--xpcom/glue/nsPointerHashKeys.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/xpcom/glue/nsPointerHashKeys.h b/xpcom/glue/nsPointerHashKeys.h
new file mode 100644
index 000000000..a89843101
--- /dev/null
+++ b/xpcom/glue/nsPointerHashKeys.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Definitions for nsPtrHashKey<T> and nsVoidPtrHashKey. */
+
+#ifndef nsPointerHashKeys_h
+#define nsPointerHashKeys_h
+
+#include "nscore.h"
+
+#include "mozilla/Attributes.h"
+
+/**
+ * hashkey wrapper using T* KeyType
+ *
+ * @see nsTHashtable::EntryType for specification
+ */
+template<class T>
+class nsPtrHashKey : public PLDHashEntryHdr
+{
+public:
+ typedef T* KeyType;
+ typedef const T* KeyTypePointer;
+
+ explicit nsPtrHashKey(const T* aKey) : mKey(const_cast<T*>(aKey)) {}
+ nsPtrHashKey(const nsPtrHashKey<T>& aToCopy) : mKey(aToCopy.mKey) {}
+ ~nsPtrHashKey() {}
+
+ KeyType GetKey() const { return mKey; }
+ bool KeyEquals(KeyTypePointer aKey) const { return aKey == mKey; }
+
+ static KeyTypePointer KeyToPointer(KeyType aKey) { return aKey; }
+ static PLDHashNumber HashKey(KeyTypePointer aKey)
+ {
+ return NS_PTR_TO_UINT32(aKey) >> 2;
+ }
+ enum { ALLOW_MEMMOVE = true };
+
+protected:
+ T* MOZ_NON_OWNING_REF mKey;
+};
+
+typedef nsPtrHashKey<const void> nsVoidPtrHashKey;
+
+#endif // nsPointerHashKeys_h