SOCU:poll
Request
| 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
| Index Word | Description |
|---|---|
| 0 | Header code |
| 1 | Result code |
| 2 | POSIX return value |
pollfd struct
| Type | Name | Description |
|---|---|---|
| u32 | fd | Socket handle |
| u32 | events | Events to poll for (input) |
| u32 | revents | Events received (output) |
Events
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. |