| Updated: October 28, 2024 |
| Function | Classification | Library | Cancel | ISR | Signal | Thread |
|---|---|---|---|---|---|---|
| offsetof() | ANSI, POSIX 1003.1 | libc | No | Yes | Yes | Yes |
| open() | POSIX 1003.1 | libc | Yes | No | Yes | Yes |
| open64() | Large-file support | libc | Yes | No | Yes | Yes |
| open_ext() | QNX Neutrino | libc | Yes | No | Yes | Yes |
| openat() | POSIX 2008 | libc | Yes | No | Yes | Yes |
| opendir() | POSIX 1003.1 | libc | Yes | No | No | Yes |
| openfd() | QNX Neutrino | libc | Yes | No | Yes | Yes |
| openlog() | POSIX 1003.1 | libc | Yes | No | No | Yes |
| openpty() | Unix | libc | Yes | No | Yes | Yes |
| out8() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| out8s() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| out16() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| outbe16() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| outle16() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| out16s() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| out32() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| outbe32() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| outle32() | QNX Neutrino | libc | No | Yes | Yes | Yes |
| out32s() | QNX Neutrino | libc | No | Yes | Yes | Yes |