lwip_gethostbyname_r() function

Thread-safe variant of lwip_gethostbyname: instead of using a static buffer, this function takes buffer and errno pointers as arguments and uses these for the result.

Syntax

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Summary

Declaration

Definition

from netdb.h:123

int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf, size_t buflen, struct hostent **result, int *h_errnop);

Implemented in netdb.c:192

Arguments

Argument

Description

name

the hostname to resolve

ret

pre-allocated struct where to store the result

buf

pre-allocated buffer where to store additional data

buflen

the size of buf

result

pointer to a hostent pointer that is set to ret on success and set to zero on error

h_errnop

pointer to an int where to store errors (instead of modifying the global h_errno)

Return value

0 on success, non-zero on error, additional error information is stored in *h_errnop instead of h_errno to be thread-safe

Examples

References

from examples

lwip_gethostbyname_r() function

Syntax

Arguments

Return value

Examples

References

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