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XRootD
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Namespaces | |
IOEvents | |
Classes | |
class | KernelBuffer |
class | RAtomic |
class | RAtomic< bool > |
class | RAtomic< T * > |
struct | shm |
struct | shm_error |
Functions | |
int | getIovMax () |
ssize_t | Move (char *&ubuff, KernelBuffer &kbuff, size_t length) |
ssize_t | Move (KernelBuffer &kbuff, char *&ubuff) |
ssize_t | Read (int fd, KernelBuffer &buffer, uint32_t length) |
ssize_t | Read (int fd, KernelBuffer &buffer, uint32_t length, int64_t offset) |
ssize_t | Send (int fd, KernelBuffer &buffer) |
ssize_t | Write (int fd, KernelBuffer &buffer, int64_t offset) |
Variables | |
static const int | PageBits = 12 |
static const int | PageMask = 4095 |
static const int | PageSize = 4096 |
The classes here define a simple I/O event polling architecture suitable for use with non-blocking devices. As it implements an event model, it is not considered a high performance interface. For increased performance, you need to use multiple polling event loops which effectively implements a limited thread model for handling events. The implementation here is similar to libEvent with better handling of timeouts and I/O polling resumption.
While, channels are multi-thread safe, they cannot interlock with the state of their file descriptor. You must first disable (via SetFD()) or delete the channel before closing its associated file descriptor. This is the only safe way to keep channels and their file descriptors synchronized.
int XrdSys::getIovMax | ( | ) |
Definition at line 77 of file XrdSysPlatform.cc.
References IOV_MAX.
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inline |
Utility function for moving a user space buffer to kernel space.
Definition at line 462 of file XrdSysKernelBuffer.hh.
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inline |
Utility function for moving a kernel buffer to user space.
Definition at line 452 of file XrdSysKernelBuffer.hh.
Referenced by XrdCl::FileStateHandler::Write(), and XrdCl::XRootDMsgHandler::WriteMessageBody().
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inline |
Utility function for reading data from a file descriptor into a kernel buffer.
Definition at line 421 of file XrdSysKernelBuffer.hh.
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inline |
Utility function for reading data from a file descriptor into a kernel buffer.
Definition at line 410 of file XrdSysKernelBuffer.hh.
Referenced by XrdCl::FileStateHandler::Write().
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inline |
Utility function for sending data from a kernel buffer into a socket.
Definition at line 442 of file XrdSysKernelBuffer.hh.
Referenced by XrdFrmMonitor::Ident(), XrdFrmMonitor::Map(), and XrdCl::Socket::Send().
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inline |
Utility function for writing data from a kernel buffer into a file descriptor.
Definition at line 432 of file XrdSysKernelBuffer.hh.
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static |
Definition at line 38 of file XrdSysPageSize.hh.
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static |
Definition at line 37 of file XrdSysPageSize.hh.
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static |
Definition at line 36 of file XrdSysPageSize.hh.
Referenced by XrdOssCsiPages::apply_sequential_aligned_modify(), XrdOssCsiPages::BasicConsistencyCheck(), XrdOucCRC::Calc32C(), XrdOssCsiCrcUtils::crc32c_combine(), XrdOssCsiCrcUtils::crc32c_extendwith_zero(), XrdOssCsiCrcUtils::crc32c_split1(), XrdOssCsiCrcUtils::crc32c_split2(), XrdOssCsiPages::CRCMismatchError(), XrdSsiShMam::Create(), XrdOssCsiPages::FetchRange(), XrdOssCsiPages::FetchRangeAligned(), XrdOssCsiPages::FetchRangeUnaligned(), XrdOssCsiPages::FetchRangeUnaligned_postblock(), XrdOssCsiPages::FetchRangeUnaligned_preblock(), XrdCmsRRData::getBuff(), XrdCl::PgReadSubstitutionHandler::HandleResponse(), XrdCl::EcPgReadResponseHandler::HandleResponse(), XrdOssCsiPages::LockTrackinglen(), XrdOssCsiPages::PageReadError(), XrdOssCsiPages::pgDoCalc(), XrdCl::FileStateHandler::PgReadRetry(), XrdCl::FileStateHandler::PgWrite(), XrdOssCsiPages::pgWritePrelockCheck(), XrdOssCsiTagstoreFile::ResetSizes(), XrdOssCsiPages::StoreRange(), XrdOssCsiPages::StoreRangeAligned(), XrdOssCsiPages::StoreRangeUnaligned(), XrdOssCsiPages::StoreRangeUnaligned_postblock(), XrdOssCsiPages::StoreRangeUnaligned_preblock(), XrdOssCsi::tagOpenEnv(), XrdOssCsiTagstoreFile::Truncate(), XrdOssCsiPages::truncate(), XrdOssCsiPages::UpdateRange(), XrdOssCsiPages::UpdateRangeHoleUntilPage(), XrdOucCRC::Ver32C(), XrdOssCsiPages::VerifyRange(), and XrdCl::XRootDMsgHandler::WriteMessageBody().