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791f79fcb3
- 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.
157 lines
4.7 KiB
C
157 lines
4.7 KiB
C
#ifndef COSMOPOLITAN_LIBC_LIMITS_H_
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#define COSMOPOLITAN_LIBC_LIMITS_H_
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#define __STDC_LIMIT_MACROS
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#define CHAR_BIT 8
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#define PATH_MAX 1024
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#define NAME_MAX 255
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#define ARG_MAX 131074
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#define UCHAR_MIN 0
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#define UCHAR_MAX 255
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#if '\200' < 0
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#define CHAR_MIN '\200'
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#define CHAR_MAX '\177'
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#else
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#define CHAR_MIN '\0'
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#define CHAR_MAX '\377'
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#endif
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#define SCHAR_MAX __SCHAR_MAX__
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#define SHRT_MAX __SHRT_MAX__
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#define INT_MAX __INT_MAX__
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#define LONG_MAX __LONG_MAX__
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#define LLONG_MAX LONG_LONG_MAX
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#define LONG_LONG_MAX __LONG_LONG_MAX__
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#define SIZE_MAX __SIZE_MAX__
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#define INT8_MAX __INT8_MAX__
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#define INT16_MAX __INT16_MAX__
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#define INT32_MAX __INT32_MAX__
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#define INT64_MAX __INT64_MAX__
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#define WINT_MAX __WINT_MAX__
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#define WCHAR_MAX __WCHAR_MAX__
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#define INTPTR_MAX __INTPTR_MAX__
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#define PTRDIFF_MAX __PTRDIFF_MAX__
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#define UINTPTR_MAX __UINTPTR_MAX__
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#define UINT8_MAX __UINT8_MAX__
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#define UINT16_MAX __UINT16_MAX__
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#define UINT32_MAX __UINT32_MAX__
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#define UINT64_MAX __UINT64_MAX__
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#define INTMAX_MAX __INTMAX_MAX__
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#define UINTMAX_MAX __UINTMAX_MAX__
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#define SSIZE_MAX __INT64_MAX__
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#define SCHAR_MIN (-SCHAR_MAX - 1)
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#define SHRT_MIN (-SHRT_MAX - 1)
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#define INT_MIN (-INT_MAX - 1)
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#define LONG_MIN (-LONG_MAX - 1)
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#define LLONG_MIN (-LLONG_MAX - 1)
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#define LONG_LONG_MIN (-LONG_LONG_MAX - 1)
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#define SIZE_MIN (-SIZE_MAX - 1)
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#define INT8_MIN (-INT8_MAX - 1)
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#define INT16_MIN (-INT16_MAX - 1)
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#define INT32_MIN (-INT32_MAX - 1)
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#define INT64_MIN (-INT64_MAX - 1)
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#define INTMAX_MIN (-INTMAX_MAX - 1)
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#define INTPTR_MIN (-INTPTR_MAX - 1)
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#define WINT_MIN __WINT_MIN__
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#define WCHAR_MIN (-WCHAR_MAX - 1)
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#define PTRDIFF_MIN (-PTRDIFF_MAX - 1)
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#define USHRT_MAX 65535
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#define UINT_MAX 0xffffffffu
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#if __SIZEOF_LONG__ == 8
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#define ULONG_MAX 0xfffffffffffffffful
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#else
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#define ULONG_MAX 0xfffffffful
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#endif
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#define ULLONG_MAX 0xffffffffffffffffull
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#define ULONG_LONG_MAX 0xffffffffffffffffull
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#define USHRT_MIN 0
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#define UINT_MIN 0u
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#define ULONG_MIN 0ul
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#define ULLONG_MIN 0ull
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#define ULONG_LONG_MIN 0ull
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#define UINT8_MIN 0
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#define UINT16_MIN 0
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#define UINT32_MIN 0u
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#define UINT64_MIN 0ull
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#define UINTPTR_MIN 0ull
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#define UINTMAX_MIN ((uintmax_t)0)
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#define MB_CUR_MAX 4
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#define MB_LEN_MAX 4
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#ifdef _COSMO_SOURCE
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#if __GNUC__ * 100 + __GNUC_MINOR__ >= 406 || defined(__llvm__)
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#define INT128_MIN (-INT128_MAX - 1)
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#define UINT128_MIN ((uint128_t)0)
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#define INT128_MAX \
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((int128_t)0x7fffffffffffffff << 64 | (int128_t)0xffffffffffffffff)
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#define UINT128_MAX \
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((uint128_t)0xffffffffffffffff << 64 | (uint128_t)0xffffffffffffffff)
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#endif /* GCC 4.6+ */
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#endif /* _COSMO_SOURCE */
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#define SIG_ATOMIC_MIN INT32_MIN
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#define SIG_ATOMIC_MAX INT32_MAX
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#define FILESIZEBITS 64
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#define SYMLOOP_MAX 40
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#define TTY_NAME_MAX 32
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#define HOST_NAME_MAX 255
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#define TZNAME_MAX 6
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#define WORD_BIT 32
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#define SEM_VALUE_MAX 0x7fffffff
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#define SEM_NSEMS_MAX 256
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#define DELAYTIMER_MAX 0x7fffffff
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#define MQ_PRIO_MAX 32768
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#define LOGIN_NAME_MAX 256
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#define NL_ARGMAX 9
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#define NL_MSGMAX 32767
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#define NL_SETMAX 255
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#define NL_TEXTMAX 2048
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#define INT_FAST8_MIN (-__INT_FAST8_MAX__ - 1)
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#define INT_FAST16_MIN (-__INT_FAST16_MAX__ - 1)
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#define INT_FAST32_MIN (-__INT_FAST32_MAX__ - 1)
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#define INT_FAST64_MIN (-__INT_FAST64_MAX__ - 1)
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#define INT_LEAST8_MIN (-__INT_LEAST8_MAX__ - 1)
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#define INT_LEAST16_MIN (-__INT_LEAST16_MAX__ - 1)
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#define INT_LEAST32_MIN (-__INT_LEAST32_MAX__ - 1)
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#define INT_LEAST64_MIN (-__INT_LEAST64_MAX__ - 1)
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#define INT_FAST8_MAX __INT_FAST8_MAX__
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#define INT_FAST16_MAX __INT_FAST16_MAX__
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#define INT_FAST32_MAX __INT_FAST32_MAX__
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#define INT_FAST64_MAX __INT_FAST64_MAX__
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#define INT_LEAST8_MAX __INT_LEAST8_MAX__
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#define INT_LEAST16_MAX __INT_LEAST16_MAX__
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#define INT_LEAST32_MAX __INT_LEAST32_MAX__
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#define INT_LEAST64_MAX __INT_LEAST64_MAX__
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#define UINT_FAST8_MAX __UINT_FAST8_MAX__
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#define UINT_FAST16_MAX __UINT_FAST16_MAX__
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#define UINT_FAST32_MAX __UINT_FAST32_MAX__
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#define UINT_FAST64_MAX __UINT_FAST64_MAX__
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#define UINT_LEAST8_MAX __UINT_LEAST8_MAX__
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#define UINT_LEAST16_MAX __UINT_LEAST16_MAX__
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#define UINT_LEAST32_MAX __UINT_LEAST32_MAX__
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#define UINT_LEAST64_MAX __UINT_LEAST64_MAX__
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#define BC_BASE_MAX 99
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#define BC_DIM_MAX 2048
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#define BC_SCALE_MAX 99
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#define BC_STRING_MAX 1000
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#define CHARCLASS_NAME_MAX 14
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#define COLL_WEIGHTS_MAX 2
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#define EXPR_NEST_MAX 32
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#define LINE_MAX 4096
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#define RE_DUP_MAX 255
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#define LONG_BIT 64
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#define NZERO 20
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#define NL_LANGMAX 32
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#endif /* COSMOPOLITAN_LIBC_LIMITS_H_ */
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