gecko-dev/xpcom/glue/Observer.h
Ehsan Akhgari e368dc9c85 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

78 lines
1.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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 mozilla_Observer_h
#define mozilla_Observer_h
#include "nsTArray.h"
namespace mozilla {
/**
* Observer<T> provides a way for a class to observe something.
* When an event has to be broadcasted to all Observer<T>, Notify() method
* is called.
* T represents the type of the object passed in argument to Notify().
*
* @see ObserverList.
*/
template <class T>
class Observer
{
public:
virtual ~Observer() { }
virtual void Notify(const T& aParam) = 0;
};
/**
* ObserverList<T> tracks Observer<T> and can notify them when Broadcast() is
* called.
* T represents the type of the object passed in argument to Broadcast() and
* sent to Observer<T> objects through Notify().
*
* @see Observer.
*/
template <class T>
class ObserverList
{
public:
/**
* Note: When calling AddObserver, it's up to the caller to make sure the
* object isn't going to be release as long as RemoveObserver hasn't been
* called.
*
* @see RemoveObserver()
*/
void AddObserver(Observer<T>* aObserver) {
mObservers.AppendElement(aObserver);
}
/**
* Remove the observer from the observer list.
* @return Whether the observer has been found in the list.
*/
bool RemoveObserver(Observer<T>* aObserver) {
return mObservers.RemoveElement(aObserver);
}
uint32_t Length() {
return mObservers.Length();
}
void Broadcast(const T& aParam) {
uint32_t size = mObservers.Length();
for (uint32_t i=0; i<size; ++i) {
mObservers[i]->Notify(aParam);
}
}
protected:
nsTArray<Observer<T>*> mObservers;
};
} // namespace mozilla
#endif // mozilla_Observer_h