213 lines
6.9 KiB
C++
213 lines
6.9 KiB
C++
/*
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* DO NOT EDIT. THIS FILE IS GENERATED FROM c:/mozilla/xpcom/base/nsIMemory.idl
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*/
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#ifndef __gen_nsIMemory_h__
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#define __gen_nsIMemory_h__
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#ifndef __gen_nsISupports_h__
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#include "nsISupports.h"
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#endif
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/* For IDL files that don't want to include root IDL files. */
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#ifndef NS_NO_VTABLE
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#define NS_NO_VTABLE
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#endif
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/* starting interface: nsIMemory */
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#define NS_IMEMORY_IID_STR "59e7e77a-38e4-11d4-8cf5-0060b0fc14a3"
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#define NS_IMEMORY_IID \
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{0x59e7e77a, 0x38e4, 0x11d4, \
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{ 0x8c, 0xf5, 0x00, 0x60, 0xb0, 0xfc, 0x14, 0xa3 }}
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/**
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*
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* nsIMemory: interface to allocate and deallocate memory. Also provides
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* for notifications in low-memory situations.
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*
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* The frozen exported symbols NS_Alloc, NS_Realloc, and NS_Free
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* provide a more efficient way to access XPCOM memory allocation. Using
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* those symbols is preferred to using the methods on this interface.
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*
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* A client that wishes to be notified of low memory situations (for
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* example, because the client maintains a large memory cache that
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* could be released when memory is tight) should register with the
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* observer service (see nsIObserverService) using the topic
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* "memory-pressure". There are three specific types of notications
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* that can occur. These types will be passed as the |aData|
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* parameter of the of the "memory-pressure" notification:
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*
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* "low-memory"
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* This will be passed as the extra data when the pressure
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* observer is being asked to flush for low-memory conditions.
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*
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* "heap-minimize"
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* This will be passed as the extra data when the pressure
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* observer is being asked to flush because of a heap minimize
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* call.
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*
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* "alloc-failure"
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* This will be passed as the extra data when the pressure
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* observer has been asked to flush because a malloc() or
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* realloc() has failed.
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*
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* @status FROZEN
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*/
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class NS_NO_VTABLE nsIMemory : public nsISupports {
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IMEMORY_IID)
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/**
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* Allocates a block of memory of a particular size. If the memory
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* cannot be allocated (because of an out-of-memory condition), null
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* is returned.
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*
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* @param size - the size of the block to allocate
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* @result the block of memory
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*/
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/* [noscript, notxpcom] voidPtr alloc (in size_t size); */
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NS_IMETHOD_(void *) Alloc(size_t size) = 0;
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/**
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* Reallocates a block of memory to a new size.
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*
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* @param ptr - the block of memory to reallocate
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* @param size - the new size
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* @result the reallocated block of memory
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*
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* If ptr is null, this function behaves like malloc.
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* If s is the size of the block to which ptr points, the first
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* min(s, size) bytes of ptr's block are copied to the new block.
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* If the allocation succeeds, ptr is freed and a pointer to the
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* new block returned. If the allocation fails, ptr is not freed
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* and null is returned. The returned value may be the same as ptr.
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*/
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/* [noscript, notxpcom] voidPtr realloc (in voidPtr ptr, in size_t newSize); */
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NS_IMETHOD_(void *) Realloc(void * ptr, size_t newSize) = 0;
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/**
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* Frees a block of memory. Null is a permissible value, in which case
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* nothing happens.
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*
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* @param ptr - the block of memory to free
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*/
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/* [noscript, notxpcom] void free (in voidPtr ptr); */
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NS_IMETHOD_(void) Free(void * ptr) = 0;
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/**
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* Attempts to shrink the heap.
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* @param immediate - if true, heap minimization will occur
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* immediately if the call was made on the main thread. If
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* false, the flush will be scheduled to happen when the app is
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* idle.
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* @return NS_ERROR_FAILURE if 'immediate' is set an the call
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* was not on the application's main thread.
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*/
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/* void heapMinimize (in boolean immediate); */
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NS_IMETHOD HeapMinimize(PRBool immediate) = 0;
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/**
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* This predicate can be used to determine if we're in a low-memory
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* situation (what constitutes low-memory is platform dependent). This
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* can be used to trigger the memory pressure observers.
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*/
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/* boolean isLowMemory (); */
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NS_IMETHOD IsLowMemory(PRBool *_retval) = 0;
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};
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/* Use this macro when declaring classes that implement this interface. */
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#define NS_DECL_NSIMEMORY \
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NS_IMETHOD_(void *) Alloc(size_t size); \
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NS_IMETHOD_(void *) Realloc(void * ptr, size_t newSize); \
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NS_IMETHOD_(void) Free(void * ptr); \
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NS_IMETHOD HeapMinimize(PRBool immediate); \
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NS_IMETHOD IsLowMemory(PRBool *_retval);
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/* Use this macro to declare functions that forward the behavior of this interface to another object. */
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#define NS_FORWARD_NSIMEMORY(_to) \
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NS_IMETHOD_(void *) Alloc(size_t size) { return _to Alloc(size); } \
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NS_IMETHOD_(void *) Realloc(void * ptr, size_t newSize) { return _to Realloc(ptr, newSize); } \
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NS_IMETHOD_(void) Free(void * ptr) { return _to Free(ptr); } \
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NS_IMETHOD HeapMinimize(PRBool immediate) { return _to HeapMinimize(immediate); } \
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NS_IMETHOD IsLowMemory(PRBool *_retval) { return _to IsLowMemory(_retval); }
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/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
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#define NS_FORWARD_SAFE_NSIMEMORY(_to) \
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NS_IMETHOD_(void *) Alloc(size_t size) { return !_to ? NS_ERROR_NULL_POINTER : _to->Alloc(size); } \
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NS_IMETHOD_(void *) Realloc(void * ptr, size_t newSize) { return !_to ? NS_ERROR_NULL_POINTER : _to->Realloc(ptr, newSize); } \
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NS_IMETHOD_(void) Free(void * ptr) { return !_to ? NS_ERROR_NULL_POINTER : _to->Free(ptr); } \
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NS_IMETHOD HeapMinimize(PRBool immediate) { return !_to ? NS_ERROR_NULL_POINTER : _to->HeapMinimize(immediate); } \
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NS_IMETHOD IsLowMemory(PRBool *_retval) { return !_to ? NS_ERROR_NULL_POINTER : _to->IsLowMemory(_retval); }
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#if 0
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/* Use the code below as a template for the implementation class for this interface. */
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/* Header file */
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class nsMemory : public nsIMemory
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIMEMORY
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nsMemory();
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private:
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~nsMemory();
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protected:
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/* additional members */
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};
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/* Implementation file */
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NS_IMPL_ISUPPORTS1(nsMemory, nsIMemory)
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nsMemory::nsMemory()
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{
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/* member initializers and constructor code */
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}
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nsMemory::~nsMemory()
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{
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/* destructor code */
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}
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/* [noscript, notxpcom] voidPtr alloc (in size_t size); */
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NS_IMETHODIMP_(void *) nsMemory::Alloc(size_t size)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* [noscript, notxpcom] voidPtr realloc (in voidPtr ptr, in size_t newSize); */
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NS_IMETHODIMP_(void *) nsMemory::Realloc(void * ptr, size_t newSize)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* [noscript, notxpcom] void free (in voidPtr ptr); */
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NS_IMETHODIMP_(void) nsMemory::Free(void * ptr)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* void heapMinimize (in boolean immediate); */
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NS_IMETHODIMP nsMemory::HeapMinimize(PRBool immediate)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* boolean isLowMemory (); */
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NS_IMETHODIMP nsMemory::IsLowMemory(PRBool *_retval)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* End of implementation class template. */
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#endif
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#endif /* __gen_nsIMemory_h__ */
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