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Many bugfixes and improvements to my SafeArray / SafeList utility classes. 

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@1427 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
Jake.Stine 2009-06-24 13:13:59 +00:00
parent c1fc72a634
commit d9c40a7ccd
1 changed files with 128 additions and 52 deletions
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180
pcsx2/SafeArray.h
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@ -16,8 +16,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef __SAFEARRAY_H__
#define __SAFEARRAY_H__
#pragma once
extern void* __fastcall pcsx2_aligned_malloc(size_t size, size_t align);
extern void* __fastcall pcsx2_aligned_realloc(void* handle, size_t size, size_t align);
@ -76,21 +75,19 @@ public:
static const int DefaultChunkSize = 0x1000 * sizeof(T);
public:
const std::string Name; // user-assigned block name
const char* Name; // user-assigned block name
int ChunkSize;
protected:
T* m_ptr;
int m_size; // size of the allocation of memory
const static std::string m_str_Unnamed;
protected:
// Internal constructor for use by derived classes. This allows a derived class to
// use its own memory allocation (with an aligned memory, for example).
// Throws:
// Exception::OutOfMemory if the allocated_mem pointer is NULL.
explicit SafeArray( const std::string& name, T* allocated_mem, int initSize ) :
explicit SafeArray( const char* name, T* allocated_mem, int initSize ) :
Name( name )
, ChunkSize( DefaultChunkSize )
, m_ptr( allocated_mem )
@ -102,7 +99,10 @@ protected:
virtual T* _virtual_realloc( int newsize )
{
return (T*)realloc( m_ptr, newsize * sizeof(T) );
return (T*)((m_ptr == NULL) ?
malloc( newsize * sizeof(T) ) :
realloc( m_ptr, newsize * sizeof(T) )
);
}
public:
@ -111,7 +111,7 @@ public:
safe_free( m_ptr );
}
explicit SafeArray( const std::string& name="Unnamed" ) :
explicit SafeArray( const char* name="Unnamed" ) :
Name( name )
, ChunkSize( DefaultChunkSize )
, m_ptr( NULL )
@ -119,39 +119,61 @@ public:
{
}
explicit SafeArray( int initialSize, const std::string& name="Unnamed" ) :
explicit SafeArray( int initialSize, const char* name="Unnamed" ) :
Name( name )
, ChunkSize( DefaultChunkSize )
, m_ptr( (T*)malloc( initialSize * sizeof(T) ) )
, m_ptr( (initialSize==0) ? NULL : (T*)malloc( initialSize * sizeof(T) ) )
, m_size( initialSize )
{
if( m_ptr == NULL )
if( (initialSize != 0) && (m_ptr == NULL) )
throw Exception::OutOfMemory();
}
// Clears the contents of the array to zero, and frees all memory allocations.
void Dispose()
{
m_size = 0;
safe_free( m_ptr );
}
bool IsDisposed() const { return (m_ptr==NULL); }
// Returns the size of the memory allocation, as according to the array type.
int GetLength() const { return m_size; }
// Returns the size of the memory allocation in bytes.
int GetSizeInBytes() const { return m_size * sizeof(T); }
// reallocates the array to the explicit size. Can be used to shrink or grow an
// array, and bypasses the internal threshold growth indicators.
void ExactAlloc( int newsize )
{
if( newsize == m_size ) return;
m_ptr = _virtual_realloc( newsize );
if( m_ptr == NULL )
{
throw Exception::OutOfMemory(
"Out-of-memory on block re-allocation. "
"Old size: " + to_string( m_size ) + " bytes, "
"New size: " + to_string( newsize ) + " bytes"
);
}
m_size = newsize;
}
// Ensures that the allocation is large enough to fit data of the
// amount requested. The memory allocation is not resized smaller.
void MakeRoomFor( int blockSize )
void MakeRoomFor( int newsize )
{
if( blockSize > m_size )
{
const uint newalloc = blockSize + ChunkSize;
m_ptr = _virtual_realloc( newalloc );
if( m_ptr == NULL )
{
throw Exception::OutOfMemory(
"Out-of-memory on block re-allocation. "
"Old size: " + to_string( m_size ) + " bytes, "
"New size: " + to_string( newalloc ) + " bytes"
);
}
m_size = newalloc;
}
if( newsize > m_size )
ExactAlloc( newsize );
}
// Extends the containment area of the array. Extensions are performed
// in chunks.
void GrowBy( int items )
{
MakeRoomFor( m_size + ChunkSize + items + 1 );
}
// Gets a pointer to the requested allocation index.
@ -185,7 +207,7 @@ protected:
{
assert( 0 ); // makes debugging easier sometimes. :)
throw Exception::IndexBoundsFault(
"Index out of bounds on SafeArray: " + Name +
"Index out of bounds on SafeArray: " + std::string(Name) +
" (index=" + to_string(i) +
", size=" + to_string(m_size) + ")"
);
@ -193,20 +215,26 @@ protected:
#endif
return &m_ptr[i];
}
};
//////////////////////////////////////////////////////////////////////////////////////////
// SafeList - Simple growable container without all the mess or hassle of std containers.
//
// This container is intended for reasonably simple class types only. Things which this
// container does not handle with desired robustness:
//
// * Classes with non-trivial constructors (such that construction creates much overhead)
// * Classes with copy constructors (copying is done using performance memcpy)
// * Classes with destructors (they're not called, sorry!)
//
template< typename T >
class SafeList
class SafeList : public NoncopyableObject
{
public:
static const int DefaultChunkSize = 0x80 * sizeof(T);
public:
const std::string Name; // user-assigned block name
const char* Name; // user-assigned block name
int ChunkSize; // assigned DefaultChunkSize on init, reconfigurable at any time.
protected:
@ -214,22 +242,20 @@ protected:
int m_allocsize; // size of the allocation of memory
uint m_length; // length of the array (active items, not buffer allocation)
const static std::string m_str_Unnamed;
protected:
virtual T* _virtual_realloc( int newsize )
{
return (T*)realloc( m_ptr, newsize * sizeof(T) );
}
void _boundsCheck( uint i )
void _boundsCheck( uint i ) const
{
#ifdef PCSX2_DEVBUILD
if( i >= (uint)m_length )
{
assert( 0 ); // makes debugging easier sometimes. :)
throw Exception::IndexBoundsFault(
"Index out of bounds on SafeArray: " + Name +
"Index out of bounds on SafeArray: " + std::string(Name) +
" (index=" + to_string(i) +
", length=" + to_string(m_length) + ")"
);
@ -240,9 +266,10 @@ protected:
public:
virtual ~SafeList()
{
safe_free( m_ptr );
}
explicit SafeList( const std::string& name="Unnamed" ) :
explicit SafeList( const char* name="Unnamed" ) :
Name( name )
, ChunkSize( DefaultChunkSize )
, m_ptr( NULL )
@ -251,7 +278,7 @@ public:
{
}
explicit SafeList( int initialSize, const std::string& name="Unnamed" ) :
explicit SafeList( int initialSize, const char* name="Unnamed" ) :
Name( name )
, ChunkSize( DefaultChunkSize )
, m_ptr( (T*)malloc( initialSize * sizeof(T) ) )
@ -260,6 +287,12 @@ public:
{
if( m_ptr == NULL )
throw Exception::OutOfMemory();
for( int i=0; i<m_allocsize; ++i )
{
new (&m_ptr[i]) T();
}
}
// Returns the size of the list, as according to the array type. This includes
@ -276,7 +309,7 @@ public:
{
if( blockSize > m_allocsize )
{
const uint newalloc = blockSize + ChunkSize;
const int newalloc = blockSize + ChunkSize;
m_ptr = _virtual_realloc( newalloc );
if( m_ptr == NULL )
{
@ -286,21 +319,57 @@ public:
"New size: " + to_string( newalloc ) + " bytes"
);
}
m_allocsize = newalloc;
for( ; m_allocsize<newalloc; ++m_allocsize )
{
new (&m_ptr[m_allocsize]) T();
}
}
}
void GrowBy( int items )
{
MakeRoomFor( m_length + ChunkSize + items + 1 );
}
// Sets the item length to zero. Does not free memory allocations.
void Clear()
{
m_length = 0;
}
// Appends an item to the end of the list and returns a handle to it.
T& New()
{
_MakeRoomFor_threshold( m_length + 1 );
return m_ptr[m_length++];
}
// Gets an element of this memory allocation much as if it were an array.
// DevBuilds : Throws Exception::IndexBoundsFault() if the index is invalid.
T& operator[]( int idx ) { return *_getPtr( (uint)idx ); }
const T& operator[]( int idx ) const { return *_getPtr( (uint)idx ); }
T& operator[]( int idx ) { return *_getPtr( (uint)idx ); }
const T& operator[]( int idx ) const { return *_getPtr( (uint)idx ); }
T* GetPtr() { return m_ptr; }
const T* GetPtr() const { return m_ptr; }
T& GetLast() { return m_ptr[m_length-1]; }
const T& GetLast() const{ return m_ptr[m_length-1]; }
int Add( const T& src )
{
MakeRoomFor( m_length + 1 );
_MakeRoomFor_threshold( m_length + 1 );
m_ptr[m_length] = src;
return m_length++;
}
// Same as Add, but returns the handle of the new object instead of it's array index.
T& AddNew( const T& src )
{
_MakeRoomFor_threshold( m_length + 1 );
m_ptr[m_length] = src;
return m_ptr[m_length];
}
// Performs a standard array-copy removal of the given item. All items past the
// given item are copied over. Throws Exception::IndexBoundsFault() if the index
@ -316,11 +385,17 @@ public:
virtual SafeList<T>* Clone() const
{
SafeList<T>* retval = new SafeList<T>( m_length );
memcpy_fast( retval->GetPtr(), m_ptr, sizeof(T) * m_length );
memcpy_fast( retval->m_ptr, m_ptr, sizeof(T) * m_length );
return retval;
}
protected:
void _MakeRoomFor_threshold( int newsize )
{
MakeRoomFor( newsize + ChunkSize );
}
// A safe array index fetcher. Throws an exception if the array index
// is outside the bounds of the array.
// Performance Considerations: This function adds quite a bit of overhead
@ -345,18 +420,21 @@ class SafeAlignedArray : public SafeArray<T>
protected:
T* _virtual_realloc( int newsize )
{
return (T*)_aligned_realloc( this->m_ptr, newsize * sizeof(T), Alignment );
return (T*)( ( m_ptr == NULL ) ?
_aligned_malloc( newsize * sizeof(T), Alignment ) :
_aligned_realloc( m_ptr, newsize * sizeof(T), Alignment )
);
}
// Appends "(align: xx)" to the name of the allocation in devel builds.
// Maybe useful,maybe not... no harm in attaching it. :D
string _getName( const string& src )
/*string _getName( const string& src )
{
#ifdef PCSX2_DEVBUILD
return src + "(align:" + to_string(Alignment) + ")";
return src + ;
#endif
return src;
}
}*/
public:
virtual ~SafeAlignedArray()
@ -365,14 +443,14 @@ public:
// mptr is set to null, so the parent class's destructor won't re-free it.
}
explicit SafeAlignedArray( const std::string& name="Unnamed" ) :
explicit SafeAlignedArray( const char* name="Unnamed" ) :
SafeArray<T>::SafeArray( name )
{
}
explicit SafeAlignedArray( int initialSize, const std::string& name="Unnamed" ) :
explicit SafeAlignedArray( int initialSize, const char* name="Unnamed" ) :
SafeArray<T>::SafeArray(
_getName(name),
name,
(T*)_aligned_malloc( initialSize * sizeof(T), Alignment ),
initialSize
)
@ -386,5 +464,3 @@ public:
return retval;
}
};
#endif