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- We now serialize the file descriptor table when spawning / executing processes on Windows. This means you can now inherit more stuff than just standard i/o. It's needed by bash, which duplicates the console to file descriptor #255. We also now do a better job serializing the environment variables, so you're less likely to encounter E2BIG when using your bash shell. We also no longer coerce environ to uppercase - execve() on Windows now remotely controls its parent process to make them spawn a replacement for itself. Then it'll be able to terminate immediately once the spawn succeeds, without having to linger around for the lifetime as a shell process for proxying the exit code. When process worker thread running in the parent sees the child die, it's given a handle to the new child, to replace it in the process table. - execve() and posix_spawn() on Windows will now provide CreateProcess an explicit handle list. This allows us to remove handle locks which enables better fork/spawn concurrency, with seriously correct thread safety. Other codebases like Go use the same technique. On the other hand fork() still favors the conventional WIN32 inheritence approach which can be a little bit messy, but is *controlled* by guaranteeing perfectly clean slates at both the spawning and execution boundaries - sigset_t is now 64 bits. Having it be 128 bits was a mistake because there's no reason to use that and it's only supported by FreeBSD. By using the system word size, signal mask manipulation on Windows goes very fast. Furthermore @asyncsignalsafe funcs have been rewritten on Windows to take advantage of signal masking, now that it's much more pleasant to use. - All the overlapped i/o code on Windows has been rewritten for pretty good signal and cancelation safety. We're now able to ensure overlap data structures are cleaned up so long as you don't longjmp() out of out of a signal handler that interrupted an i/o operation. Latencies are also improved thanks to the removal of lots of "busy wait" code. Waits should be optimal for everything except poll(), which shall be the last and final demon we slay in the win32 i/o horror show. - getrusage() on Windows is now able to report RUSAGE_CHILDREN as well as RUSAGE_SELF, thanks to aggregation in the process manager thread.
79 lines
5.5 KiB
C
79 lines
5.5 KiB
C
#ifndef COSMOPOLITAN_LIBC_NT_THREADS_H_
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#define COSMOPOLITAN_LIBC_NT_THREADS_H_
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#include "libc/nt/struct/context.h"
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#include "libc/nt/struct/overlapped.h"
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#include "libc/nt/struct/securityattributes.h"
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#include "libc/nt/thunk/msabi.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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╔────────────────────────────────────────────────────────────────▀▀▀─────────│─╗
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│ cosmopolitan § new technology » threads ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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int64_t CreateThread(const struct NtSecurityAttributes *lpThreadAttributes,
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size_t dwStackSize, void *lpStartAddress,
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void *lpParameter, uint32_t dwCreationFlags,
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uint32_t *opt_lpThreadId) paramsnonnull((3));
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void ExitThread(uint32_t dwExitCode) wontreturn;
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int64_t GetCurrentThread(void);
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uint32_t GetCurrentThreadId(void);
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uint64_t SetThreadAffinityMask(int64_t hThread, uintptr_t dwThreadAffinityMask);
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int64_t OpenThread(uint32_t dwDesiredAccess, bool32 bInheritHandle,
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uint32_t dwThreadId);
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bool32 TerminateThread(int64_t hThread, uint32_t dwExitCode);
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bool32 GetExitCodeThread(int64_t hThread, uint32_t *lpExitCode);
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/* e.g. kNtThreadPriorityAboveNormal, -1u on error */
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uint32_t GetThreadPriority(int64_t hThread);
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bool32 SetThreadPriority(int64_t hThread, int32_t nPriority);
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bool32 SetThreadPriorityBoost(int64_t hThread, bool32 bDisablePriorityBoost);
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bool32 GetThreadPriorityBoost(int64_t hThread, bool32 *pDisablePriorityBoost);
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bool32 GetThreadIOPendingFlag(int64_t hThread, bool32 *lpIOIsPending);
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bool32 CancelSynchronousIo(int64_t hThread);
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bool32 CancelIo(int64_t hFile);
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bool32 CancelIoEx(int64_t hFile, struct NtOverlapped *opt_lpOverlapped);
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uint32_t TlsAlloc(void);
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bool32 TlsFree(uint32_t);
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bool32 TlsSetValue(uint32_t, void *);
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void *TlsGetValue(uint32_t);
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uint32_t SuspendThread(int64_t hThread);
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uint32_t ResumeThread(int64_t hThread);
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bool32 GetThreadContext(int64_t hThread, struct NtContext *in_out_lpContext);
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bool32 SetThreadContext(int64_t hThread, const struct NtContext *lpContext);
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void *SetThreadDescription(int64_t hThread,
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const char16_t *lpThreadDescription);
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void *GetThreadDescription(int64_t hThread,
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char16_t *out_ppszThreadDescription);
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#if ShouldUseMsabiAttribute()
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#include "libc/nt/thunk/thread.inc"
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#endif /* ShouldUseMsabiAttribute() */
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_NT_THREADS_H_ */
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