cosmopolitan/libc/nt/iocp.h
Justine Tunney 49b0eaa69f
Improve threading and i/o routines
- On Windows connect() can now be interrupted by a signal; connect() w/
  O_NONBLOCK will now raise EINPROGRESS; and connect() with SO_SNDTIMEO
  will raise ETIMEDOUT after the interval has elapsed.

- We now get the AcceptEx(), ConnectEx(), and TransmitFile() functions
  from the WIN32 API the officially blessed way, using WSAIoctl().

- Do nothing on Windows when fsync() is called on a directory handle.
  This was raising EACCES earlier becaues GENERIC_WRITE is required on
  the handle. It's possible to FlushFileBuffers() a directory handle if
  it's opened with write access but MSDN doesn't document what it does.
  If you have any idea, please let us know!

- Prefer manual reset event objects for read() and write() on Windows.

- Do some code cleanup on our dlmalloc customizations.

- Fix errno type error in Windows blocking routines.

- Make the futex polyfill simpler and faster.
2023-10-12 23:13:04 -07:00

77 lines
5.4 KiB
C

#ifndef COSMOPOLITAN_LIBC_NT_IOCP_H_
#define COSMOPOLITAN_LIBC_NT_IOCP_H_
#include "libc/nt/struct/overlapped.h"
#include "libc/nt/struct/overlappedentry.h"
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╔────────────────────────────────────────────────────────────────▀▀▀─────────│─╗
│ cosmopolitan § new technology » i/o completion ports ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
#define kNtFileSkipCompletionPortOnSuccess 1
#define kNtFileSkipSetEventOnHandle 2
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
typedef void (*NtOverlappedCompletionRoutine)(
uint32_t dwErrorCode, uint32_t dwNumberOfBytesTransfered,
struct NtOverlapped *inout_lpOverlapped);
int64_t CreateIoCompletionPort(int64_t FileHandleOrNeg1,
int64_t opt_ExistingCompletionPortOrZero,
uint64_t CompletionKey,
uint32_t NumberOfConcurrentThreads);
bool32 GetQueuedCompletionStatus(int64_t CompletionPort,
uint32_t *lpNumberOfBytesTransferred,
uint64_t *out_lpCompletionKey,
struct NtOverlapped **out_lpOverlapped,
uint32_t dwMilliseconds);
bool32 GetQueuedCompletionStatusEx(
int64_t CompletionPort,
struct NtOverlappedEntry *out_lpCompletionPortEntries, uint32_t ulCount,
uint32_t *out_ulNumEntriesRemoved, uint32_t dwMilliseconds,
bool32 fAlertable);
bool32 PostQueuedCompletionStatus(int64_t CompletionPort,
uint32_t dwNumberOfBytesTransferred,
uint64_t dwCompletionKey,
struct NtOverlapped *opt_lpOverlapped);
bool32 SetFileCompletionNotificationModes(int64_t FileHandle,
unsigned char Flags);
bool32 ReadFileEx(int64_t hFile, void *lpBuffer, uint32_t nNumberOfBytesToRead,
uint32_t *lpNumberOfBytesRead,
struct NtOverlapped *opt_lpOverlapped,
NtOverlappedCompletionRoutine lpCompletionRoutine);
bool32 WriteFileEx(int64_t hFile, const void *lpBuffer,
uint32_t nNumberOfBytesToWrite,
struct NtOverlapped *lpOverlapped,
NtOverlappedCompletionRoutine lpCompletionRoutine);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_NT_IOCP_H_ */