gecko/toolkit/components/places/nsMaybeWeakPtr.h
Ehsan Akhgari 0fd9123eac Bug 579517 - Part 1: Automated conversion of NSPR numeric types to stdint types in Gecko; r=bsmedberg
This patch was generated by a script.  Here's the source of the script for
future reference:

function convert() {
echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
       ! -wholename "*security/nss*" \
       ! -wholename "*/.hg*" \
       ! -wholename "obj-ff-dbg*" \
       ! -name nsXPCOMCID.h \
       ! -name prtypes.h \
         -type f \
      \( -iname "*.cpp" \
         -o -iname "*.h" \
         -o -iname "*.c" \
         -o -iname "*.cc" \
         -o -iname "*.idl" \
         -o -iname "*.ipdl" \
         -o -iname "*.ipdlh" \
         -o -iname "*.mm" \) | \
    xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}

convert PRInt8 int8_t
convert PRUint8 uint8_t
convert PRInt16 int16_t
convert PRUint16 uint16_t
convert PRInt32 int32_t
convert PRUint32 uint32_t
convert PRInt64 int64_t
convert PRUint64 uint64_t

convert PRIntn int
convert PRUintn unsigned

convert PRSize size_t

convert PROffset32 int32_t
convert PROffset64 int64_t

convert PRPtrdiff ptrdiff_t

convert PRFloat64 double
2012-08-22 11:56:38 -04:00

84 lines
2.7 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsMaybeWeakPtr_h_
#define nsMaybeWeakPtr_h_
#include "nsCOMPtr.h"
#include "nsWeakReference.h"
#include "nsTArray.h"
// nsMaybeWeakPtr is a helper object to hold a strong-or-weak reference
// to the template class. It's pretty minimal, but sufficient.
class nsMaybeWeakPtr_base
{
protected:
// Returns an addref'd pointer to the requested interface
void* GetValueAs(const nsIID& iid) const;
nsCOMPtr<nsISupports> mPtr;
};
template<class T>
class nsMaybeWeakPtr : private nsMaybeWeakPtr_base
{
public:
nsMaybeWeakPtr(nsISupports *ref) { mPtr = ref; }
nsMaybeWeakPtr(const nsCOMPtr<nsIWeakReference> &ref) { mPtr = ref; }
nsMaybeWeakPtr(const nsCOMPtr<T> &ref) { mPtr = ref; }
bool operator==(const nsMaybeWeakPtr<T> &other) const {
return mPtr == other.mPtr;
}
operator const nsCOMPtr<T>() const { return GetValue(); }
protected:
const nsCOMPtr<T> GetValue() const {
return nsCOMPtr<T>(dont_AddRef(static_cast<T*>
(GetValueAs(NS_GET_TEMPLATE_IID(T)))));
}
};
// nsMaybeWeakPtrArray is an array of MaybeWeakPtr objects, that knows how to
// grab a weak reference to a given object if requested. It only allows a
// given object to appear in the array once.
typedef nsTArray< nsMaybeWeakPtr<nsISupports> > isupports_array_type;
nsresult NS_AppendWeakElementBase(isupports_array_type *aArray,
nsISupports *aElement, bool aWeak);
nsresult NS_RemoveWeakElementBase(isupports_array_type *aArray,
nsISupports *aElement);
template<class T>
class nsMaybeWeakPtrArray : public nsTArray< nsMaybeWeakPtr<T> >
{
public:
nsresult AppendWeakElement(T *aElement, bool aOwnsWeak)
{
return NS_AppendWeakElementBase(
reinterpret_cast<isupports_array_type*>(this), aElement, aOwnsWeak);
}
nsresult RemoveWeakElement(T *aElement)
{
return NS_RemoveWeakElementBase(
reinterpret_cast<isupports_array_type*>(this), aElement);
}
};
// Call a method on each element in the array, but only if the element is
// non-null.
#define ENUMERATE_WEAKARRAY(array, type, method) \
for (uint32_t array_idx = 0; array_idx < array.Length(); ++array_idx) { \
const nsCOMPtr<type> &e = array.ElementAt(array_idx); \
if (e) \
e->method; \
}
#endif