2020-06-15 14:18:57 +00:00
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#ifndef COSMOPOLITAN_LIBC_SYSV_CONSTS_FIO_H_
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#define COSMOPOLITAN_LIBC_SYSV_CONSTS_FIO_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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Support non-blocking i/o across platforms
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
2023-07-23 09:56:47 +00:00
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extern const uint32_t FIONREAD; /* one of the few encouraged ioctls */
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extern const uint32_t FIONBIO; /* use fcntl(fd, F_SETFL, O_NONBLOCK) */
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extern const uint32_t FIOCLEX; /* use fcntl(fd, F_SETFD, FD_CLOEXEC) */
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extern const uint32_t FIONCLEX; /* use fcntl(fd, F_SETFD, 0) */
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extern const uint32_t FIOASYNC; /* todo: fcntl(fd, F_SETOWN, pid) */
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2020-06-15 14:18:57 +00:00
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2023-06-09 06:44:03 +00:00
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#define FIONREAD FIONREAD
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2020-06-15 14:18:57 +00:00
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2023-06-09 12:18:38 +00:00
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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2020-06-15 14:18:57 +00:00
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#endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_FIO_H_ */
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