_pulse
Structure that describes a pulse
Synopsis:
#include <sys/neutrino.h> struct _pulse { uint16_t type; uint16_t subtype; int8_t code; uint8_t zero[3]; union sigval value; int32_t scoid; };
Description:
The _pulse structure describes a pulse, a fixed-size, nonblocking message that carries a small payload (four bytes of data plus a single byte code). The members include:
- type
- _PULSE_TYPE (0)
- subtype
- _PULSE_SUBTYPE (0)
- code
- A code that identifies the type of pulse.
The QNX Neutrino OS reserves the negative codes, including the following:
- _PULSE_CODE_UNBLOCK
- _PULSE_CODE_DISCONNECT
- _PULSE_CODE_THREADDEATH
- _PULSE_CODE_COIDDEATH
- _PULSE_CODE_NET_ACK, _PULSE_CODE_NET_UNBLOCK, and _PULSE_CODE_NET_DETACH — reserved for the io-pkt* resource manager.
You can define your own pulses, with a code in the range from _PULSE_CODE_MINAVAIL through _PULSE_CODE_MAXAVAIL.
- value
- Information that's relevant to the code:
- _PULSE_CODE_UNBLOCK — the receive ID (rcvid) associated with the blocking message.
- _PULSE_CODE_DISCONNECT — no value defined.
- _PULSE_CODE_THREADDEATH — the thread ID of the thread that died.
- _PULSE_CODE_COIDDEATH — the connection ID of a connection that was attached to a destroyed channel.
For more details, see ChannelCreate() .
If you define your own pulses, you can decide what information you want to store in this field.
- scoid
- Server connection ID.