Commit ad362fc1c3560fbd88d09c7e59da83daaa2834c4
Committed by
Stéphane Raimbault
Stéphane Raimbault
1 parent
db3b8525
Use nonblocking sockets on Win32 and OS X/iOS too
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13 additions
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0 deletions
src/modbus-tcp.c
| ... | ... | @@ -218,6 +218,19 @@ static int _modbus_tcp_set_ipv4_options(int s) |
| 218 | 218 | return -1; |
| 219 | 219 | } |
| 220 | 220 | |
| 221 | + /* If the OS does not offer SOCK_NONBLOCK, fall back to setting FIONBIO to make sockets non-blocking */ | |
| 222 | + /* Do not care about the return value, this is optional */ | |
| 223 | +#if !defined(SOCK_NONBLOCK) && defined(FIONBIO) | |
| 224 | +#ifdef OS_WIN32 | |
| 225 | + /* Setting FIONBIO expects an unsigned long according to MSDN */ | |
| 226 | + unsigned long ioctloption = 1; | |
| 227 | + ioctlsocket(s, FIONBIO, &ioctloption); | |
| 228 | +#else | |
| 229 | + option = 1; | |
| 230 | + ioctl(s, FIONBIO, &option); | |
| 231 | +#endif | |
| 232 | +#endif | |
| 233 | + | |
| 221 | 234 | #ifndef OS_WIN32 |
| 222 | 235 | /** |
| 223 | 236 | * Cygwin defines IPTOS_LOWDELAY but can't handle that flag so it's | ... | ... |