SOCU:poll

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Revision as of 13:05, 24 November 2019 by Unknown (talk | contribs) (→‎Events: Fix values for flags and add new flags)
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Request[edit]

Index Word Description
0 Header code [0x00140084]
1 nfds_t nfds
2 int timeout
3 Value 0x20 (processID header)
4 ProcessID set by the ARM11 kernel.
5 (insize<<14) | 0x2802
6 Pointer to input pollfd struct array

The following is located 0x100-bytes after the beginning of the above command buffer:

Index Word Description
0 (outsize<<14) | 2
1 Pointer to output pollfd struct array

Response[edit]

Index Word Description
0 Header code
1 Result code
2 POSIX return value

pollfd struct[edit]

Type Name Description
u32 fd Socket handle
u32 events Events to poll for (input)
u32 revents Events received (output)

Events[edit]

Events are a bitwise set of these flags.

Value Name Description
0x01 POLLRDNORM Normal data can be read.
0x02 POLLRDBAND Priority Band Data can be read.
0x04 POLLPRI Urgent data can be read.
0x08 POLLWRNORM Normal data can be written.
0x10 POLLWRBAND Priority data can be written.
0x20 POLLERR Socket has an error condition.
0x40 POLLHUP Socket has been disconnected.
0x80 POLLNVAL Invalid socket handle. This is set if you use fd=-1, which is non-standard behavior.
POLLRDNORM | POLLRDBAND POLLIN Data can be read.
POLLWRNORM POLLOUT Data can be written.