BContactField*
BContactField::Duplicate(BContactField* from)
{
BContactField* child = NULL;
type_code childType = from->FieldType();
ObjectDeleter<BContactField> deleter;
switch (childType) {
case B_CONTACT_NAME:
case B_CONTACT_NICKNAME:
case B_CONTACT_EMAIL:
case B_CONTACT_NOTE:
case B_CONTACT_ORGANIZATION:
case B_CONTACT_IM:
case B_CONTACT_URL:
case B_CONTACT_PHONE:
child = new BStringContactField(childType);
break;
case B_CONTACT_ADDRESS:
child = new BAddressContactField();
break;
case B_CONTACT_PHOTO:
child = new BPhotoContactField();
break;
}
if (child != NULL && child->CopyDataFrom(from) == B_OK)
return child;
deleter.SetTo(child);
return NULL;
}
status_t
BLocale::GetStartOfWeek(BWeekday* startOfWeek) const
{
if (startOfWeek == NULL)
return B_BAD_VALUE;
BAutolock lock(fLock);
if (!lock.IsLocked())
return B_ERROR;
UErrorCode err = U_ZERO_ERROR;
ObjectDeleter<Calendar> calendar = Calendar::createInstance(
*BFormattingConventions::Private(&fConventions).ICULocale(), err);
if (U_FAILURE(err))
return B_ERROR;
UCalendarDaysOfWeek icuWeekStart = calendar->getFirstDayOfWeek(err);
if (U_FAILURE(err))
return B_ERROR;
switch (icuWeekStart) {
case UCAL_SUNDAY:
*startOfWeek = B_WEEKDAY_SUNDAY;
break;
case UCAL_MONDAY:
*startOfWeek = B_WEEKDAY_MONDAY;
break;
case UCAL_TUESDAY:
*startOfWeek = B_WEEKDAY_TUESDAY;
break;
case UCAL_WEDNESDAY:
*startOfWeek = B_WEEKDAY_WEDNESDAY;
break;
case UCAL_THURSDAY:
*startOfWeek = B_WEEKDAY_THURSDAY;
break;
case UCAL_FRIDAY:
*startOfWeek = B_WEEKDAY_FRIDAY;
break;
case UCAL_SATURDAY:
*startOfWeek = B_WEEKDAY_SATURDAY;
break;
default:
return B_ERROR;
}
return B_OK;
}
BContactField*
BContactField::Duplicate(BContactField* from)
{
BContactField* child = NULL;
type_code childType = from->FieldType();
ObjectDeleter<BContactField> deleter;
child = BContactField::InstantiateChildClass(childType);
if (child != NULL && child->CopyDataFrom(from) == B_OK)
return child;
deleter.SetTo(child);
return NULL;
}
// You cannot instantiate a pure BContactField
// so this method help to unflatten the correct
// derived class
BContactField*
BContactField::UnflattenChildClass(const void* from, ssize_t size)
{
BMemoryIO data(from, size);
type_code childType;
data.Read(&childType, sizeof(childType));
ObjectDeleter<BContactField> deleter;
BContactField* child = NULL;
switch (childType) {
case B_CONTACT_NAME:
case B_CONTACT_NICKNAME:
case B_CONTACT_EMAIL:
case B_CONTACT_NOTE:
case B_CONTACT_ORGANIZATION:
case B_CONTACT_IM:
case B_CONTACT_URL:
case B_CONTACT_PHONE:
child = new BStringContactField(childType);
break;
case B_CONTACT_ADDRESS:
child = new BAddressContactField();
break;
case B_CONTACT_PHOTO:
child = new BPhotoContactField();
break;
default:
return NULL;
}
if (child == NULL)
return NULL;
status_t ret = child->Unflatten(B_CONTACT_FIELD_TYPE, from, size);
if (ret == B_OK)
return child;
deleter.SetTo(child);
return NULL;
}
// You cannot instantiate a pure BContactField
// so this method help to unflatten the correct
// derived class
BContactField*
BContactField::UnflattenChildClass(const void* from, ssize_t size)
{
BMemoryIO data(from, size);
type_code childType;
data.Read(&childType, sizeof(childType));
ObjectDeleter<BContactField> deleter;
BContactField* child = NULL;
child = BContactField::InstantiateChildClass(childType);
if (child == NULL)
return NULL;
status_t ret = child->Unflatten(B_CONTACT_FIELD_TYPE, from, size);
if (ret == B_OK)
return child;
deleter.SetTo(child);
return NULL;
}
void
MemoryView::_HandleContextMenu(BPoint point)
{
int32 offset = _GetOffsetAt(point);
if (offset < fSelectionStart || offset > fSelectionEnd)
return;
BPopUpMenu* menu = new(std::nothrow) BPopUpMenu("Options");
if (menu == NULL)
return;
ObjectDeleter<BPopUpMenu> menuDeleter(menu);
ObjectDeleter<BMenuItem> itemDeleter;
ObjectDeleter<BMessage> messageDeleter;
BMessage* message = NULL;
BMenuItem* item = NULL;
if (fSelectionEnd - fSelectionStart == fTargetAddressSize / 2) {
BMessage* message = new(std::nothrow) BMessage(MSG_INSPECT_ADDRESS);
if (message == NULL)
return;
target_addr_t address;
if (fTargetAddressSize == 8)
address = *((uint32*)(fTargetBlock->Data() + fSelectionStart));
else
address = *((uint64*)(fTargetBlock->Data() + fSelectionStart));
if (fCurrentEndianMode == EndianModeBigEndian)
address = B_HOST_TO_BENDIAN_INT64(address);
else
address = B_HOST_TO_LENDIAN_INT64(address);
messageDeleter.SetTo(message);
message->AddUInt64("address", address);
BMenuItem* item = new(std::nothrow) BMenuItem("Inspect", message);
if (item == NULL)
return;
messageDeleter.Detach();
itemDeleter.SetTo(item);
if (!menu->AddItem(item))
return;
item->SetTarget(Looper());
itemDeleter.Detach();
}
message = new(std::nothrow) BMessage(B_COPY);
if (message == NULL)
return;
messageDeleter.SetTo(message);
item = new(std::nothrow) BMenuItem("Copy", message);
if (item == NULL)
return;
messageDeleter.Detach();
itemDeleter.SetTo(item);
if (!menu->AddItem(item))
return;
item->SetTarget(this);
itemDeleter.Detach();
menuDeleter.Detach();
BPoint screenWhere(point);
ConvertToScreen(&screenWhere);
BRect mouseRect(screenWhere, screenWhere);
mouseRect.InsetBy(-4.0, -4.0);
menu->Go(screenWhere, true, false, mouseRect, true);
}
status_t
BHttpRequest::_MakeRequest()
{
delete fSocket;
if (fSSL)
fSocket = new(std::nothrow) CheckedSecureSocket(this);
else
fSocket = new(std::nothrow) BSocket();
if (fSocket == NULL)
return B_NO_MEMORY;
_EmitDebug(B_URL_PROTOCOL_DEBUG_TEXT, "Connection to %s on port %d.",
fUrl.Authority().String(), fRemoteAddr.Port());
status_t connectError = fSocket->Connect(fRemoteAddr);
if (connectError != B_OK) {
_EmitDebug(B_URL_PROTOCOL_DEBUG_ERROR, "Socket connection error %s",
strerror(connectError));
return connectError;
}
//! ProtocolHook:ConnectionOpened
if (fListener != NULL)
fListener->ConnectionOpened(this);
_EmitDebug(B_URL_PROTOCOL_DEBUG_TEXT,
"Connection opened, sending request.");
_SendRequest();
_SendHeaders();
fSocket->Write("\r\n", 2);
_EmitDebug(B_URL_PROTOCOL_DEBUG_TEXT, "Request sent.");
_SendPostData();
fRequestStatus = kRequestInitialState;
// Receive loop
bool receiveEnd = false;
bool parseEnd = false;
bool readByChunks = false;
bool decompress = false;
status_t readError = B_OK;
ssize_t bytesRead = 0;
ssize_t bytesReceived = 0;
ssize_t bytesTotal = 0;
off_t bytesUnpacked = 0;
char* inputTempBuffer = new(std::nothrow) char[kHttpBufferSize];
ssize_t inputTempSize = kHttpBufferSize;
ssize_t chunkSize = -1;
DynamicBuffer decompressorStorage;
BDataIO* decompressingStream;
ObjectDeleter<BDataIO> decompressingStreamDeleter;
while (!fQuit && !(receiveEnd && parseEnd)) {
if (!receiveEnd) {
fSocket->WaitForReadable();
BStackOrHeapArray<char, 4096> chunk(kHttpBufferSize);
bytesRead = fSocket->Read(chunk, kHttpBufferSize);
if (bytesRead < 0) {
readError = bytesRead;
break;
} else if (bytesRead == 0)
receiveEnd = true;
fInputBuffer.AppendData(chunk, bytesRead);
} else
bytesRead = 0;
if (fRequestStatus < kRequestStatusReceived) {
_ParseStatus();
//! ProtocolHook:ResponseStarted
if (fRequestStatus >= kRequestStatusReceived && fListener != NULL)
fListener->ResponseStarted(this);
}
if (fRequestStatus < kRequestHeadersReceived) {
_ParseHeaders();
if (fRequestStatus >= kRequestHeadersReceived) {
_ResultHeaders() = fHeaders;
//! ProtocolHook:HeadersReceived
if (fListener != NULL)
fListener->HeadersReceived(this);
// Parse received cookies
if (fContext != NULL) {
for (int32 i = 0; i < fHeaders.CountHeaders(); i++) {
if (fHeaders.HeaderAt(i).NameIs("Set-Cookie")) {
fContext->GetCookieJar().AddCookie(
fHeaders.HeaderAt(i).Value(), fUrl);
}
}
}
if (BString(fHeaders["Transfer-Encoding"]) == "chunked")
readByChunks = true;
BString contentEncoding(fHeaders["Content-Encoding"]);
// We don't advertise "deflate" support (see above), but we
// still try to decompress it, if a server ever sends a deflate
// stream despite it not being in our Accept-Encoding list.
if (contentEncoding == "gzip"
|| contentEncoding == "deflate") {
decompress = true;
readError = BZlibCompressionAlgorithm()
.CreateDecompressingOutputStream(&decompressorStorage,
NULL, decompressingStream);
if (readError != B_OK)
break;
decompressingStreamDeleter.SetTo(decompressingStream);
}
int32 index = fHeaders.HasHeader("Content-Length");
if (index != B_ERROR)
bytesTotal = atoi(fHeaders.HeaderAt(index).Value());
else
bytesTotal = -1;
}
}
if (fRequestStatus >= kRequestHeadersReceived) {
// If Transfer-Encoding is chunked, we should read a complete
// chunk in buffer before handling it
if (readByChunks) {
if (chunkSize >= 0) {
if ((ssize_t)fInputBuffer.Size() >= chunkSize + 2) {
// 2 more bytes to handle the closing CR+LF
bytesRead = chunkSize;
if (inputTempSize < chunkSize + 2) {
delete[] inputTempBuffer;
inputTempSize = chunkSize + 2;
inputTempBuffer
= new(std::nothrow) char[inputTempSize];
}
if (inputTempBuffer == NULL) {
readError = B_NO_MEMORY;
break;
}
fInputBuffer.RemoveData(inputTempBuffer,
chunkSize + 2);
chunkSize = -1;
} else {
// Not enough data, try again later
bytesRead = -1;
}
} else {
BString chunkHeader;
if (_GetLine(chunkHeader) == B_ERROR) {
chunkSize = -1;
bytesRead = -1;
} else {
// Format of a chunk header:
// <chunk size in hex>[; optional data]
int32 semiColonIndex = chunkHeader.FindFirst(';', 0);
// Cut-off optional data if present
if (semiColonIndex != -1) {
chunkHeader.Remove(semiColonIndex,
chunkHeader.Length() - semiColonIndex);
}
chunkSize = strtol(chunkHeader.String(), NULL, 16);
PRINT(("BHP[%p] Chunk %s=%ld\n", this,
chunkHeader.String(), chunkSize));
if (chunkSize == 0)
fRequestStatus = kRequestContentReceived;
bytesRead = -1;
}
}
// A chunk of 0 bytes indicates the end of the chunked transfer
if (bytesRead == 0)
receiveEnd = true;
} else {
bytesRead = fInputBuffer.Size();
if (bytesRead > 0) {
if (inputTempSize < bytesRead) {
inputTempSize = bytesRead;
delete[] inputTempBuffer;
inputTempBuffer = new(std::nothrow) char[bytesRead];
}
if (inputTempBuffer == NULL) {
readError = B_NO_MEMORY;
break;
}
fInputBuffer.RemoveData(inputTempBuffer, bytesRead);
}
}
if (bytesRead >= 0) {
bytesReceived += bytesRead;
if (fListener != NULL) {
if (decompress) {
readError = decompressingStream->WriteExactly(
inputTempBuffer, bytesRead);
if (readError != B_OK)
break;
ssize_t size = decompressorStorage.Size();
BStackOrHeapArray<char, 4096> buffer(size);
size = decompressorStorage.Read(buffer, size);
if (size > 0) {
fListener->DataReceived(this, buffer, bytesUnpacked,
size);
bytesUnpacked += size;
}
} else if (bytesRead > 0) {
fListener->DataReceived(this, inputTempBuffer,
bytesReceived - bytesRead, bytesRead);
}
fListener->DownloadProgress(this, bytesReceived,
std::max((ssize_t)0, bytesTotal));
}
if (bytesTotal >= 0 && bytesReceived >= bytesTotal)
receiveEnd = true;
if (decompress && receiveEnd) {
readError = decompressingStream->Flush();
if (readError == B_BUFFER_OVERFLOW)
readError = B_OK;
if (readError != B_OK)
break;
ssize_t size = decompressorStorage.Size();
BStackOrHeapArray<char, 4096> buffer(size);
size = decompressorStorage.Read(buffer, size);
if (fListener != NULL && size > 0) {
fListener->DataReceived(this, buffer,
bytesUnpacked, size);
bytesUnpacked += size;
}
}
}
}
parseEnd = (fInputBuffer.Size() == 0);
}
fSocket->Disconnect();
delete[] inputTempBuffer;
if (readError != B_OK)
return readError;
return fQuit ? B_INTERRUPTED : B_OK;
}
status_t
Architecture::CreateStackTrace(Team* team,
ImageDebugInfoProvider* imageInfoProvider, CpuState* cpuState,
StackTrace*& _stackTrace, int32 maxStackDepth, bool useExistingTrace)
{
BReference<CpuState> cpuStateReference(cpuState);
StackTrace* stackTrace = NULL;
ObjectDeleter<StackTrace> stackTraceDeleter;
StackFrame* frame = NULL;
if (useExistingTrace)
stackTrace = _stackTrace;
else {
// create the object
stackTrace = new(std::nothrow) StackTrace;
if (stackTrace == NULL)
return B_NO_MEMORY;
stackTraceDeleter.SetTo(stackTrace);
}
// if we're passed an already existing partial stack trace,
// attempt to continue building it from where it left off.
if (stackTrace->CountFrames() > 0) {
frame = stackTrace->FrameAt(stackTrace->CountFrames() - 1);
cpuState = frame->GetCpuState();
}
while (cpuState != NULL) {
// get the instruction pointer
target_addr_t instructionPointer = cpuState->InstructionPointer();
if (instructionPointer == 0)
break;
// get the image for the instruction pointer
AutoLocker<Team> teamLocker(team);
Image* image = team->ImageByAddress(instructionPointer);
BReference<Image> imageReference(image);
teamLocker.Unlock();
// get the image debug info
ImageDebugInfo* imageDebugInfo = NULL;
if (image != NULL)
imageInfoProvider->GetImageDebugInfo(image, imageDebugInfo);
BReference<ImageDebugInfo> imageDebugInfoReference(imageDebugInfo,
true);
// get the function
teamLocker.Lock();
FunctionInstance* function = NULL;
FunctionDebugInfo* functionDebugInfo = NULL;
if (imageDebugInfo != NULL) {
function = imageDebugInfo->FunctionAtAddress(instructionPointer);
if (function != NULL)
functionDebugInfo = function->GetFunctionDebugInfo();
}
BReference<FunctionInstance> functionReference(function);
teamLocker.Unlock();
// If the CPU state's instruction pointer is actually the return address
// of the next frame, we let the architecture fix that.
if (frame != NULL
&& frame->ReturnAddress() == cpuState->InstructionPointer()) {
UpdateStackFrameCpuState(frame, image,
functionDebugInfo, cpuState);
}
// create the frame using the debug info
StackFrame* previousFrame = NULL;
CpuState* previousCpuState = NULL;
if (function != NULL) {
status_t error = functionDebugInfo->GetSpecificImageDebugInfo()
->CreateFrame(image, function, cpuState, previousFrame,
previousCpuState);
if (error != B_OK && error != B_UNSUPPORTED)
break;
}
// If we have no frame yet, let the architecture create it.
if (previousFrame == NULL) {
status_t error = CreateStackFrame(image, functionDebugInfo,
cpuState, frame == NULL, previousFrame, previousCpuState);
if (error != B_OK)
break;
}
cpuStateReference.SetTo(previousCpuState, true);
previousFrame->SetImage(image);
previousFrame->SetFunction(function);
if (!stackTrace->AddFrame(previousFrame)) {
delete previousFrame;
return B_NO_MEMORY;
}
frame = previousFrame;
cpuState = previousCpuState;
if (--maxStackDepth == 0)
break;
}
stackTraceDeleter.Detach();
_stackTrace = stackTrace;
return B_OK;
}
/*static*/ status_t
Inode::Create(Transaction& transaction, Inode* parent, const char* name,
int32 mode, int openMode, uint8 type, bool* _created, ino_t* _id,
Inode** _inode, fs_vnode_ops* vnodeOps, uint32 publishFlags)
{
TRACE("Inode::Create()\n");
Volume* volume = transaction.GetVolume();
DirectoryIterator* entries = NULL;
ObjectDeleter<DirectoryIterator> entriesDeleter;
if (parent != NULL) {
parent->WriteLockInTransaction(transaction);
TRACE("Inode::Create(): Looking up entry destination\n");
HTree htree(volume, parent);
status_t status = htree.Lookup(name, &entries);
if (status == B_ENTRY_NOT_FOUND) {
panic("We need to add the first node.\n");
return B_ERROR;
}
if (status != B_OK)
return status;
entriesDeleter.SetTo(entries);
TRACE("Inode::Create(): Looking up to see if file already exists\n");
ino_t entryID;
status = entries->FindEntry(name, &entryID);
if (status == B_OK) {
// File already exists
TRACE("Inode::Create(): File already exists\n");
if (S_ISDIR(mode) || S_ISLNK(mode) || (openMode & O_EXCL) != 0)
return B_FILE_EXISTS;
Vnode vnode(volume, entryID);
Inode* inode;
status = vnode.Get(&inode);
if (status != B_OK) {
TRACE("Inode::Create() Failed to get the inode from the "
"vnode\n");
return B_ENTRY_NOT_FOUND;
}
if (inode->IsDirectory() && (openMode & O_RWMASK) != O_RDONLY)
return B_IS_A_DIRECTORY;
if ((openMode & O_DIRECTORY) != 0 && !inode->IsDirectory())
return B_NOT_A_DIRECTORY;
if (inode->CheckPermissions(open_mode_to_access(openMode)
| ((openMode & O_TRUNC) != 0 ? W_OK : 0)) != B_OK)
return B_NOT_ALLOWED;
if ((openMode & O_TRUNC) != 0) {
// Truncate requested
TRACE("Inode::Create(): Truncating file\n");
inode->WriteLockInTransaction(transaction);
status = inode->Resize(transaction, 0);
if (status != B_OK)
return status;
}
if (_created != NULL)
*_created = false;
if (_id != NULL)
*_id = inode->ID();
if (_inode != NULL)
*_inode = inode;
if (_id != NULL || _inode != NULL)
vnode.Keep();
TRACE("Inode::Create(): Done opening file\n");
return B_OK;
/*} else if ((mode & S_ATTR_DIR) == 0) {
TRACE("Inode::Create(): (mode & S_ATTR_DIR) == 0\n");
return B_BAD_VALUE;*/
} else if ((openMode & O_DIRECTORY) != 0) {
TRACE("Inode::Create(): (openMode & O_DIRECTORY) != 0\n");
return B_ENTRY_NOT_FOUND;
}
// Return to initial position
TRACE("Inode::Create(): Restarting iterator\n");
entries->Restart();
}
status_t status;
if (parent != NULL) {
status = parent->CheckPermissions(W_OK);
if (status != B_OK)
return status;
}
TRACE("Inode::Create(): Allocating inode\n");
ino_t id;
status = volume->AllocateInode(transaction, parent, mode, id);
if (status != B_OK) {
ERROR("Inode::Create(): AllocateInode() failed\n");
return status;
}
if (entries != NULL) {
size_t nameLength = strlen(name);
status = entries->AddEntry(transaction, name, nameLength, id, type);
if (status != B_OK) {
ERROR("Inode::Create(): AddEntry() failed\n");
return status;
}
}
TRACE("Inode::Create(): Creating inode\n");
Inode* inode = new(std::nothrow) Inode(volume);
if (inode == NULL)
return B_NO_MEMORY;
TRACE("Inode::Create(): Getting node structure\n");
ext2_inode& node = inode->Node();
TRACE("Inode::Create(): Initializing inode data\n");
memset(&node, 0, sizeof(ext2_inode));
node.SetMode(mode);
node.SetUserID(geteuid());
node.SetGroupID(parent != NULL ? parent->Node().GroupID() : getegid());
node.SetNumLinks(inode->IsDirectory() ? 2 : 1);
TRACE("Inode::Create(): Updating time\n");
struct timespec timespec;
_BigtimeToTimespec(real_time_clock_usecs(), ×pec);
inode->SetAccessTime(×pec);
inode->SetCreationTime(×pec);
inode->SetModificationTime(×pec);
node.SetFlags(parent->Flags() & EXT2_INODE_INHERITED);
if (volume->HasExtentsFeature()
&& (inode->IsDirectory() || inode->IsFile())) {
node.SetFlag(EXT2_INODE_EXTENTS);
ExtentStream stream(volume, &node.extent_stream, 0);
stream.Init();
ASSERT(stream.Check());
}
if (sizeof(ext2_inode) < volume->InodeSize())
node.SetExtraInodeSize(sizeof(ext2_inode) - EXT2_INODE_NORMAL_SIZE);
TRACE("Inode::Create(): Updating ID\n");
inode->fID = id;
if (inode->IsDirectory()) {
TRACE("Inode::Create(): Initializing directory\n");
status = inode->InitDirectory(transaction, parent);
if (status != B_OK) {
ERROR("Inode::Create(): InitDirectory() failed\n");
delete inode;
return status;
}
}
// TODO: Maybe it can be better
/*if (volume->HasExtendedAttributes()) {
TRACE("Inode::Create(): Initializing extended attributes\n");
uint32 blockGroup = 0;
uint32 pos = 0;
uint32 allocated;
status = volume->AllocateBlocks(transaction, 1, 1, blockGroup, pos,
allocated);
if (status != B_OK)
return status;
// Clear the new block
uint32 blockNum = volume->FirstDataBlock() + pos +
volume->BlocksPerGroup() * blockGroup;
CachedBlock cached(volume);
cached.SetToWritable(transaction, blockNum, true);
node.SetExtendedAttributesBlock(blockNum);
}*/
TRACE("Inode::Create(): Saving inode\n");
status = inode->WriteBack(transaction);
if (status != B_OK) {
delete inode;
return status;
}
TRACE("Inode::Create(): Creating vnode\n");
Vnode vnode;
status = vnode.Publish(transaction, inode, vnodeOps, publishFlags);
if (status != B_OK)
return status;
if (!inode->IsSymLink()) {
// Vnode::Publish doesn't publish symlinks
if (!inode->IsDirectory()) {
status = inode->EnableFileCache();
if (status != B_OK)
return status;
}
inode->WriteLockInTransaction(transaction);
}
if (_created)
*_created = true;
if (_id != NULL)
*_id = id;
if (_inode != NULL)
*_inode = inode;
if (_id != NULL || _inode != NULL)
vnode.Keep();
TRACE("Inode::Create(): Deleting entries iterator\n");
DirectoryIterator* iterator = entriesDeleter.Detach();
TRACE("Inode::Create(): Entries iterator: %p\n", entries);
delete iterator;
TRACE("Inode::Create(): Done\n");
return B_OK;
}
status_t
MessagingService::_AllocateCommand(int32 commandWhat, int32 size,
MessagingArea *&area, void *&data, bool &wasEmpty)
{
if (!fFirstArea)
return B_NO_INIT;
if (!MessagingArea::CheckCommandSize(size))
return B_BAD_VALUE;
// delete the discarded areas (save one)
ObjectDeleter<MessagingArea> discardedAreaDeleter;
MessagingArea *discardedArea = NULL;
while (fFirstArea != fLastArea) {
area = fFirstArea;
area->Lock();
if (!area->IsEmpty()) {
area->Unlock();
break;
}
PRINT(("MessagingService::_AllocateCommand(): Discarding area: %p\n",
area));
fFirstArea = area->NextArea();
area->SetNextArea(NULL);
discardedArea = area;
discardedAreaDeleter.SetTo(area);
}
// allocate space for the command in the last area
area = fLastArea;
area->Lock();
data = area->AllocateCommand(commandWhat, size, wasEmpty);
if (!data) {
// not enough space in the last area: create a new area or reuse a
// discarded one
if (discardedArea) {
area = discardedAreaDeleter.Detach();
area->InitHeader();
PRINT(("MessagingService::_AllocateCommand(): Not enough space "
"left in current area. Recycling discarded one: %p\n", area));
} else {
area = MessagingArea::Create(fLockSem, fCounterSem);
PRINT(("MessagingService::_AllocateCommand(): Not enough space "
"left in current area. Allocated new one: %p\n", area));
}
if (!area) {
fLastArea->Unlock();
return B_NO_MEMORY;
}
// add the new area
fLastArea->SetNextArea(area);
fLastArea->Unlock();
fLastArea = area;
// allocate space for the command
data = area->AllocateCommand(commandWhat, size, wasEmpty);
if (!data) {
// that should never happen
area->Unlock();
return B_NO_MEMORY;
}
}
return B_OK;
}
