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SourceVuESP-IDF Framework and ExampleslwIPlwip_select_cb

lwip_select_cb struct

Description for a task waiting in select

Syntax

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Summary

Declaration

from sockets_priv.h:147

struct lwip_select_cb { struct lwip_select_cb *next; struct lwip_select_cb *prev; #if LWIP_SOCKET_SELECT fd_set *readset; fd_set *writeset; fd_set *exceptset; #endif #if LWIP_SOCKET_POLL struct pollfd *poll_fds; nfds_t poll_nfds; #endif int sem_signalled; SELECT_SEM_T sem; };

Fields

Field

Declared as

Description

lwip_select_cb::next

struct lwip_select_cb *

Pointer to the next waiting task.

lwip_select_cb::prev

struct lwip_select_cb *

Pointer to the previous waiting task.

lwip_select_cb::readset

fd_set *

readset passed to select.

lwip_select_cb::writeset

fd_set *

writeset passed to select.

lwip_select_cb::exceptset

fd_set *

unimplemented: exceptset passed to select.

lwip_select_cb::poll_fds

struct pollfd *

fds passed to poll; NULL if select.

lwip_select_cb::poll_nfds

nfds passed to poll; 0 if select.

lwip_select_cb::sem_signalled

int

don't signal the same semaphore twice: set to 1 when signalled.

lwip_select_cb::sem

semaphore to wake up a task waiting for select.

Examples

References

from examples