WvStreams
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The WvDynBuf storage class. More...
#include <wvbufstore.h>
Public Member Functions | |
WvDynBufStore (size_t _granularity, size_t _minalloc, size_t _maxalloc) | |
virtual size_t | free () const |
virtual size_t | optallocable () const |
virtual void * | alloc (size_t count) |
virtual size_t | used () const |
virtual size_t | optgettable () const |
virtual const void * | get (size_t count) |
virtual void | unget (size_t count) |
virtual size_t | ungettable () const |
virtual void | zap () |
virtual void | unalloc (size_t count) |
virtual size_t | unallocable () const |
virtual size_t | optpeekable (int offset) const |
virtual void * | mutablepeek (int offset, size_t count) |
virtual bool | isreadable () const |
virtual void | skip (size_t count) |
virtual size_t | peekable (int offset) const |
virtual const void * | peek (int offset, size_t count) |
void | move (void *buf, size_t count) |
void | copy (void *buf, int offset, size_t count) |
virtual bool | iswritable () const |
void | put (const void *data, size_t count) |
void | fastput (const void *data, size_t count) |
void | poke (const void *data, int offset, size_t count) |
virtual void | merge (WvBufStore &instore, size_t count) |
void | basicmerge (WvBufStore &instore, size_t count) |
Protected Member Functions | |
virtual WvBufStore * | newbuffer (size_t minsize) |
Called when a new buffer must be allocated to coalesce chunks. | |
virtual bool | usessubbuffers () const |
Returns true if the buffer uses subbuffers for storage. | |
virtual size_t | numsubbuffers () const |
Returns the number of subbuffers in the buffer. | |
virtual WvBufStore * | firstsubbuffer () const |
Returns the first subbuffer. | |
virtual void | appendsubbuffer (WvBufStore *buffer, bool autofree) |
Appends a subbuffer to the buffer. | |
virtual void | prependsubbuffer (WvBufStore *buffer, bool autofree) |
Prepends a subbuffer to the buffer. | |
virtual bool | unlinksubbuffer (WvBufStore *buffer, bool allowautofree) |
Unlinks the specified subbuffer. | |
virtual void | recyclebuffer (WvBufStore *buffer) |
Called when a buffer with autofree is removed from the list. | |
int | search (WvBufStoreList::Iter &it, int offset) const |
Searches for the buffer containing the offset. | |
WvBufStore * | coalesce (WvBufStoreList::Iter &it, size_t count) |
Coalesces a sequence of buffers. | |
Protected Attributes | |
WvBufStoreList | list |
size_t | totalused |
size_t | maxungettable |
int | granularity |
The WvDynBuf storage class.
Definition at line 480 of file wvbufstore.h.
WvBufStore * WvDynBufStore::newbuffer | ( | size_t | minsize | ) | [protected, virtual] |
Called when a new buffer must be allocated to coalesce chunks.
"minsize" is the minimum size for the new buffer Returns: the new buffer
Reimplemented from WvLinkedBufferStore.
Definition at line 1152 of file wvbufferstore.cc.
bool WvLinkedBufferStore::usessubbuffers | ( | ) | const [protected, virtual, inherited] |
Returns true if the buffer uses subbuffers for storage.
Reimplemented from WvBufStore.
Definition at line 745 of file wvbufferstore.cc.
size_t WvLinkedBufferStore::numsubbuffers | ( | ) | const [protected, virtual, inherited] |
Returns the number of subbuffers in the buffer.
Reimplemented from WvBufStore.
Definition at line 751 of file wvbufferstore.cc.
WvBufStore * WvLinkedBufferStore::firstsubbuffer | ( | ) | const [protected, virtual, inherited] |
Returns the first subbuffer.
Returns: the buffer or NULL if none or not supported
Reimplemented from WvBufStore.
Definition at line 757 of file wvbufferstore.cc.
void WvLinkedBufferStore::appendsubbuffer | ( | WvBufStore * | buffer, |
bool | autofree | ||
) | [protected, virtual, inherited] |
Appends a subbuffer to the buffer.
Reimplemented from WvBufStore.
Definition at line 763 of file wvbufferstore.cc.
void WvLinkedBufferStore::prependsubbuffer | ( | WvBufStore * | buffer, |
bool | autofree | ||
) | [protected, virtual, inherited] |
Prepends a subbuffer to the buffer.
Reimplemented from WvBufStore.
Definition at line 771 of file wvbufferstore.cc.
bool WvLinkedBufferStore::unlinksubbuffer | ( | WvBufStore * | buffer, |
bool | allowautofree | ||
) | [protected, virtual, inherited] |
Unlinks the specified subbuffer.
Only autofrees the buffer if allowautofree == true. Returns: the autofree flag for the buffer
Reimplemented from WvBufStore.
Definition at line 780 of file wvbufferstore.cc.
void WvLinkedBufferStore::recyclebuffer | ( | WvBufStore * | buffer | ) | [protected, virtual, inherited] |
Called when a buffer with autofree is removed from the list.
This function is not called during object destruction.
"buffer" is the buffer to be destroyed
Definition at line 1004 of file wvbufferstore.cc.
int WvLinkedBufferStore::search | ( | WvBufStoreList::Iter & | it, |
int | offset | ||
) | const [protected, inherited] |
Searches for the buffer containing the offset.
"it" is the iterator updated to point to buffer found, or to an invalid region if the offset is invalid "offset" is the offset for which to search Returns: the corrected offset within the buffer at it.ptr()
Definition at line 1010 of file wvbufferstore.cc.
WvBufStore * WvLinkedBufferStore::coalesce | ( | WvBufStoreList::Iter & | it, |
size_t | count | ||
) | [protected, inherited] |
Coalesces a sequence of buffers.
"it" is the iterator pointing to the first buffer "count" is the required number of contiguous used bytes Returns: the composite buffer
Definition at line 1042 of file wvbufferstore.cc.
References WvLinkedBufferStore::newbuffer().