mirror of
git://git.musl-libc.org/musl
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a603a75a72
this attribute was applied to pthread_self and the functions providing
the locations for errno and h_errno as an optimization; however, it is
subtly incorrect. as specified, it means the return value will always
be the same, which is not true; it varies per-thread.
this attribute also implies that the function does not depend on any
state, and that calls to it can safely be reordered across any other
code. however such reordering is unsafe for these functions: they
break when reordered before initialization of the thread pointer. such
breakage was actually observed when compiled by libfirm/cparser.
to some extent the reordering problem could be solved with strong
compiler barriers between the stages of early startup code, but the
specified meaning of of attribute((const)) is sufficiently strong that
a compiler would theoretically be justified inserting gratuitous calls
to attribute((const)) const functions at random locations (e.g. to
save the value in static storage for later use).
this reverts commit cbf35978a9.
161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
#ifndef _NETDB_H
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#define _NETDB_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#include <netinet/in.h>
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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#define __NEED_size_t
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#include <bits/alltypes.h>
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#endif
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struct addrinfo
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{
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int ai_flags;
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int ai_family;
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int ai_socktype;
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int ai_protocol;
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socklen_t ai_addrlen;
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struct sockaddr *ai_addr;
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char *ai_canonname;
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struct addrinfo *ai_next;
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};
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#define IPPORT_RESERVED 1024
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#define AI_PASSIVE 0x01
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#define AI_CANONNAME 0x02
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#define AI_NUMERICHOST 0x04
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#define AI_V4MAPPED 0x08
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#define AI_ALL 0x10
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#define AI_ADDRCONFIG 0x20
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#define AI_NUMERICSERV 0x400
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#define NI_NUMERICHOST 0x01
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#define NI_NUMERICSERV 0x02
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#define NI_NOFQDN 0x04
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#define NI_NAMEREQD 0x08
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#define NI_DGRAM 0x10
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#define NI_NUMERICSCOPE 0x100
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#define EAI_BADFLAGS -1
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#define EAI_NONAME -2
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#define EAI_AGAIN -3
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#define EAI_FAIL -4
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#define EAI_FAMILY -6
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#define EAI_SOCKTYPE -7
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#define EAI_SERVICE -8
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#define EAI_MEMORY -10
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#define EAI_SYSTEM -11
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#define EAI_OVERFLOW -12
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int getaddrinfo (const char *__restrict, const char *__restrict, const struct addrinfo *__restrict, struct addrinfo **__restrict);
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void freeaddrinfo (struct addrinfo *);
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int getnameinfo (const struct sockaddr *__restrict, socklen_t, char *__restrict, socklen_t, char *__restrict, socklen_t, int);
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const char *gai_strerror(int);
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/* Legacy functions follow (marked OBsolete in SUS) */
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struct netent
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{
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char *n_name;
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char **n_aliases;
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int n_addrtype;
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uint32_t n_net;
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};
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struct hostent
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{
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char *h_name;
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char **h_aliases;
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int h_addrtype;
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int h_length;
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char **h_addr_list;
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};
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#define h_addr h_addr_list[0]
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struct servent
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{
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char *s_name;
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char **s_aliases;
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int s_port;
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char *s_proto;
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};
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struct protoent
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{
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char *p_name;
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char **p_aliases;
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int p_proto;
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};
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void sethostent (int);
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void endhostent (void);
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struct hostent *gethostent (void);
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void setnetent (int);
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void endnetent (void);
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struct netent *getnetent (void);
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struct netent *getnetbyaddr (uint32_t, int);
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struct netent *getnetbyname (const char *);
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void setservent (int);
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void endservent (void);
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struct servent *getservent (void);
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struct servent *getservbyname (const char *, const char *);
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struct servent *getservbyport (int, const char *);
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void setprotoent (int);
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void endprotoent (void);
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struct protoent *getprotoent (void);
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struct protoent *getprotobyname (const char *);
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struct protoent *getprotobynumber (int);
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_POSIX_SOURCE) \
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|| (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE+0 < 200809L) \
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|| (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
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struct hostent *gethostbyname (const char *);
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struct hostent *gethostbyaddr (const void *, socklen_t, int);
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int *__h_errno_location(void);
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#define h_errno (*__h_errno_location())
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#define HOST_NOT_FOUND 1
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#define TRY_AGAIN 2
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#define NO_RECOVERY 3
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#define NO_DATA 4
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#define NO_ADDRESS NO_DATA
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#endif
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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void herror(const char *);
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const char *hstrerror(int);
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int gethostbyname_r(const char *, struct hostent *, char *, size_t, struct hostent **, int *);
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int gethostbyname2_r(const char *, int, struct hostent *, char *, size_t, struct hostent **, int *);
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struct hostent *gethostbyname2(const char *, int);
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int gethostbyaddr_r(const void *, socklen_t, int, struct hostent *, char *, size_t, struct hostent **, int *);
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int getservbyport_r(int, const char *, struct servent *, char *, size_t, struct servent **);
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int getservbyname_r(const char *, const char *, struct servent *, char *, size_t, struct servent **);
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#define EAI_NODATA -5
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#define EAI_ADDRFAMILY -9
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#define EAI_INPROGRESS -100
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#define EAI_CANCELED -101
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#define EAI_NOTCANCELED -102
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#define EAI_ALLDONE -103
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#define EAI_INTR -104
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#define EAI_IDN_ENCODE -105
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#define NI_MAXHOST 255
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#define NI_MAXSERV 32
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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