41
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pthread_mutex_unlock(&THR_LOCK_net);
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/* This code is not needed if my_gethostbyname_r is a macro */
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#if !defined(my_gethostbyname_r)
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Emulate SOLARIS style calls, not because it's better, but just to make the
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usage of getbostbyname_r simpler.
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#if defined(HAVE_GETHOSTBYNAME_R)
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#if defined(HAVE_GETHOSTBYNAME_R_GLIBC2_STYLE)
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struct hostent *my_gethostbyname_r(const char *name,
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struct hostent *result, char *buffer,
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int buflen, int *h_errnop)
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DBUG_ASSERT((size_t) buflen >= sizeof(*result));
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if (gethostbyname_r(name,result, buffer, (size_t) buflen, &hp, h_errnop))
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#elif defined(HAVE_GETHOSTBYNAME_R_RETURN_INT)
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struct hostent *my_gethostbyname_r(const char *name,
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struct hostent *result, char *buffer,
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int buflen, int *h_errnop)
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if (gethostbyname_r(name,result,(struct hostent_data *) buffer) == -1)
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/* gethostbyname_r with similar interface as gethostbyname() */
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struct hostent *my_gethostbyname_r(const char *name,
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struct hostent *result, char *buffer,
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int buflen, int *h_errnop)
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DBUG_ASSERT(buflen >= sizeof(struct hostent_data));
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hp= gethostbyname_r(name,result,(struct hostent_data *) buffer);
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#endif /* GLIBC2_STYLE_GETHOSTBYNAME_R */
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#else /* !HAVE_GETHOSTBYNAME_R */
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extern pthread_mutex_t LOCK_gethostbyname_r;
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No gethostbyname_r() function exists.
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In this case we have to keep a mutex over the call to ensure that no
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other thread is going to reuse the internal memory.
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The user is responsible to call my_gethostbyname_r_free() when he
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is finished with the structure.
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my_gethostbyname_r(const char *name,
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struct hostent *result __attribute__((unused)),
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char *buffer __attribute__((unused)),
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int buflen __attribute__((unused)),
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pthread_mutex_lock(&LOCK_gethostbyname_r);
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hp= gethostbyname(name);
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void my_gethostbyname_r_free()
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pthread_mutex_unlock(&LOCK_gethostbyname_r);
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#endif /* !HAVE_GETHOSTBYNAME_R */
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#endif /* !my_gethostbyname_r */