/* SPDX-License-Identifier: LGPL-2.1-only */ /* * Copyright (c) 2003-2012 Thomas Graf */ #ifndef __NETLINK_BASE_NL_BASE_UTILS_H__ #define __NETLINK_BASE_NL_BASE_UTILS_H__ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef DISABLE_PTHREADS #include #endif /*****************************************************************************/ #if __BYTE_ORDER == __BIG_ENDIAN #define ntohll(x) (x) #elif __BYTE_ORDER == __LITTLE_ENDIAN #define ntohll(x) bswap_64((x)) #endif #define htonll(x) ntohll(x) /*****************************************************************************/ #define _NL_STRINGIFY_ARG(contents) #contents #define _NL_STRINGIFY(macro_or_string) _NL_STRINGIFY_ARG(macro_or_string) /*****************************************************************************/ #if defined(__GNUC__) #define _NL_PRAGMA_WARNING_DO(warning) \ _NL_STRINGIFY(GCC diagnostic ignored warning) #elif defined(__clang__) #define _NL_PRAGMA_WARNING_DO(warning) \ _NL_STRINGIFY(clang diagnostic ignored warning) #endif /* you can only suppress a specific warning that the compiler * understands. Otherwise you will get another compiler warning * about invalid pragma option. * It's not that bad however, because gcc and clang often have the * same name for the same warning. */ #if defined(__GNUC__) && \ (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) #define _NL_PRAGMA_WARNING_DISABLE(warning) \ _Pragma("GCC diagnostic push") \ _Pragma(_NL_PRAGMA_WARNING_DO("-Wpragmas")) \ _Pragma(_NL_PRAGMA_WARNING_DO(warning)) #elif defined(__clang__) #define _NL_PRAGMA_WARNING_DISABLE(warning) \ _Pragma("clang diagnostic push") \ _Pragma(_NL_PRAGMA_WARNING_DO("-Wunknown-warning-option")) \ _Pragma(_NL_PRAGMA_WARNING_DO(warning)) #else #define _NL_PRAGMA_WARNING_DISABLE(warning) #endif #if defined(__GNUC__) && \ (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) #define _NL_PRAGMA_WARNING_REENABLE _Pragma("GCC diagnostic pop") #elif defined(__clang__) #define _NL_PRAGMA_WARNING_REENABLE _Pragma("clang diagnostic pop") #else #define _NL_PRAGMA_WARNING_REENABLE #endif /*****************************************************************************/ #define _nl_packed __attribute__((__packed__)) #define _nl_unused __attribute__((__unused__)) #define _nl_always_inline __attribute__((__always_inline__)) #define _nl_used __attribute__((__used__)) #define _nl_pure __attribute__((__pure__)) #define _nl_const __attribute__((__const__)) #define _nl_noreturn __attribute__((__noreturn__)) #define _nl_warn_unused_result __attribute__((__warn_unused_result__)) #define _nl_printf(a, b) __attribute__((__format__(__printf__, a, b))) #define _nl_align(s) __attribute__((__aligned__(s))) #define _nl_section(s) __attribute__((__section__(s))) #define _nl_alignof(type) __alignof(type) #define _nl_alignas(type) _nl_align(_nl_alignof(type)) #define _nl_deprecated(msg) __attribute__((__deprecated__(msg))) #define _nl_init __attribute__((constructor)) #define _nl_exit __attribute__((destructor)) #define _nl_auto(fcn) __attribute__((__cleanup__(fcn))) /*****************************************************************************/ #ifdef thread_local #define _nl_thread_local thread_local /* * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__ * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 */ #elif __STDC_VERSION__ >= 201112L && \ !(defined(__STDC_NO_THREADS__) || \ (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && \ __GLIBC_MINOR__ < 16)) #define _nl_thread_local _Thread_local #else #define _nl_thread_local __thread #endif /*****************************************************************************/ #define _NL_STATIC_ASSERT(cond) ((void)sizeof(char[(cond) ? 1 : -1])) /*****************************************************************************/ #if defined(NL_MORE_ASSERTS) && NL_MORE_ASSERTS > 0 #define _nl_assert(cond) assert(cond) #else #define _nl_assert(cond) \ do { \ if (0) { \ assert(cond); \ } \ } while (0) #endif #define _nl_assert_not_reached() assert(0) /*****************************************************************************/ #define _NL_BIT(n) (1ull << (n)) /*****************************************************************************/ #define _NL_PASTE_ARGS(identifier1, identifier2) identifier1##identifier2 #define _NL_PASTE(identifier1, identifier2) \ _NL_PASTE_ARGS(identifier1, identifier2) /* Taken from systemd's UNIQ_T and UNIQ macros. */ #define _NL_UNIQ_T(x, uniq) _NL_PASTE(__unique_prefix_, _NL_PASTE(x, uniq)) #define _NL_UNIQ __COUNTER__ /*****************************************************************************/ #define _nl_assert_addr_family_or_unspec(addr_family) \ do { \ typeof(addr_family) _addr_family = (addr_family); \ \ _nl_assert(_addr_family == AF_UNSPEC || \ _addr_family == AF_INET || \ _addr_family == AF_INET6); \ } while (0) #define _nl_assert_addr_family(addr_family) \ do { \ typeof(addr_family) _addr_family = (addr_family); \ \ _nl_assert(_addr_family == AF_INET || \ _addr_family == AF_INET6); \ } while (0) /*****************************************************************************/ #define _NL_SWAP(pa, pb) \ do { \ typeof(*(pa)) *_pa = (pa); \ typeof(*(pb)) *_pb = (pb); \ typeof(*_pa) _tmp; \ \ _nl_assert(_pa); \ _nl_assert(_pb); \ _tmp = *_pa; \ *_pa = *_pb; \ *_pb = _tmp; \ } while (0) /*****************************************************************************/ #define _NL_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0])) #define ARRAY_SIZE(arr) _NL_N_ELEMENTS(arr) /*****************************************************************************/ /* This is also defined in stddef.h */ #ifndef offsetof #define offsetof(TYPE, MEMBER) ((size_t) & ((TYPE *)0)->MEMBER) #endif /*****************************************************************************/ static inline uintptr_t _nl_ptr_to_uintptr(const void *p) { /* in C, pointers can only be compared (with less-than or greater-than) under certain * circumstances. Since uintptr_t is supposed to be able to represent the pointer * as a plain integer and also support to convert the integer back to the pointer, * it should be safer to compare the pointers directly. * * Of course, this function isn't very useful beyond that its use makes it clear * that we want to compare pointers by value, which otherwise may not be valid. */ return (uintptr_t)p; } /*****************************************************************************/ static inline int _nl_strcmp0(const char *s1, const char *s2) { int c; /* like g_strcmp0(), but this is inlinable. * * Also, it is guaranteed to return either -1, 0, or 1. */ if (s1 == s2) return 0; if (!s1) return -1; if (!s2) return 1; c = strcmp(s1, s2); if (c < 0) return -1; if (c > 0) return 1; return 0; } static inline bool _nl_streq(const char *a, const char *b) { return !strcmp(a, b); } static inline bool _nl_streq0(const char *a, const char *b) { return a == b || (a && b && _nl_streq(a, b)); } static inline int _nl_memcmp(const void *s1, const void *s2, size_t n) { /* Workaround undefined behavior in memcmp() with NULL pointers. */ if (n == 0) return 0; _nl_assert(s1); _nl_assert(s2); return memcmp(s1, s2, n); } static inline bool _nl_memeq(const void *s1, const void *s2, size_t len) { return _nl_memcmp(s1, s2, len) == 0; } static inline void *_nl_memcpy(void *restrict dest, const void *restrict src, size_t n) { /* Workaround undefined behavior in memcpy() with NULL pointers. */ if (n == 0) return dest; _nl_assert(src); return memcpy(dest, src, n); } /*****************************************************************************/ #define _NL_INT_IS_SIGNED(arg) (!(((typeof(arg))-1) > 0)) #define _NL_INT_SAME_SIGNEDNESS(arg1, arg2) \ (_NL_INT_IS_SIGNED(arg1) == _NL_INT_IS_SIGNED(arg2)) /*****************************************************************************/ /* glib's MIN()/MAX() macros don't have function-like behavior, in that they evaluate * the argument possibly twice. * * Taken from systemd's MIN()/MAX() macros. */ #define _NL_MIN(a, b) __NL_MIN(_NL_UNIQ, a, _NL_UNIQ, b) #define __NL_MIN(aq, a, bq, b) \ ({ \ typeof(a) _NL_UNIQ_T(A, aq) = (a); \ typeof(b) _NL_UNIQ_T(B, bq) = (b); \ \ _NL_STATIC_ASSERT(_NL_INT_SAME_SIGNEDNESS(_NL_UNIQ_T(A, aq), \ _NL_UNIQ_T(B, bq))); \ \ ((_NL_UNIQ_T(A, aq) < _NL_UNIQ_T(B, bq)) ? _NL_UNIQ_T(A, aq) : \ _NL_UNIQ_T(B, bq)); \ }) #define _NL_MAX(a, b) __NL_MAX(_NL_UNIQ, a, _NL_UNIQ, b) #define __NL_MAX(aq, a, bq, b) \ ({ \ typeof(a) _NL_UNIQ_T(A, aq) = (a); \ typeof(b) _NL_UNIQ_T(B, bq) = (b); \ \ _NL_STATIC_ASSERT(_NL_INT_SAME_SIGNEDNESS(_NL_UNIQ_T(A, aq), \ _NL_UNIQ_T(B, bq))); \ \ ((_NL_UNIQ_T(A, aq) > _NL_UNIQ_T(B, bq)) ? _NL_UNIQ_T(A, aq) : \ _NL_UNIQ_T(B, bq)); \ }) #define _NL_CLAMP(x, low, high) \ __NL_CLAMP(_NL_UNIQ, x, _NL_UNIQ, low, _NL_UNIQ, high) #define __NL_CLAMP(xq, x, lowq, low, highq, high) \ ({ \ typeof(x) _NL_UNIQ_T(X, xq) = (x); \ typeof(low) _NL_UNIQ_T(LOW, lowq) = (low); \ typeof(high) _NL_UNIQ_T(HIGH, highq) = (high); \ \ _NL_STATIC_ASSERT(_NL_INT_SAME_SIGNEDNESS( \ _NL_UNIQ_T(X, xq), _NL_UNIQ_T(LOW, lowq))); \ _NL_STATIC_ASSERT(_NL_INT_SAME_SIGNEDNESS( \ _NL_UNIQ_T(X, xq), _NL_UNIQ_T(HIGH, highq))); \ \ ((_NL_UNIQ_T(X, xq) > _NL_UNIQ_T(HIGH, highq)) ? \ _NL_UNIQ_T(HIGH, highq) : \ (_NL_UNIQ_T(X, xq) < _NL_UNIQ_T(LOW, lowq)) ? \ _NL_UNIQ_T(LOW, lowq) : \ _NL_UNIQ_T(X, xq)); \ }) #define _NL_MAX_WITH_CMP(cmp, a, b) \ ({ \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ \ (((cmp(_a, _b)) >= 0) ? _a : _b); \ }) /* evaluates to (void) if _A or _B are not constant or of different types */ #define _NL_CONST_MAX(_A, _B) \ (__builtin_choose_expr( \ (__builtin_constant_p(_A) && __builtin_constant_p(_B) && \ __builtin_types_compatible_p(typeof(_A), typeof(_B))), \ ((_A) > (_B)) ? (_A) : (_B), ((void)0))) /*****************************************************************************/ #define _NL_CMP_RETURN(c) \ do { \ const int _cc = (c); \ \ if (_cc) \ return _cc < 0 ? -1 : 1; \ } while (0) #define _NL_CMP_RETURN_DIRECT(c) \ /* Usually we want that our CMP functions return strictly * -1, 0, or 1. _NL_CMP_RETURN_DIRECT() is like _NL_CMP_RETURN(), * except, it does not clamp the integer value. */ \ do { \ const int _cc = (c); \ \ if (_cc) \ return _cc; \ } while (0) #define _NL_CMP_SELF(a, b) \ do { \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ \ if (_a == _b) \ return 0; \ if (!_a) \ return -1; \ if (!_b) \ return 1; \ } while (0) /*****************************************************************************/ #define _NL_CMP_DIRECT(a, b) \ do { \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ \ _NL_STATIC_ASSERT(_NL_INT_SAME_SIGNEDNESS(_a, _b)); \ \ if (_a != _b) \ return (_a < _b) ? -1 : 1; \ } while (0) #define _NL_CMP_DIRECT_UNSAFE(a, b) \ /* This variant is "unsafe", because it evaluates the arguments more then once. * This is only useful for bitfields, for which typeof() doesn't work. * Don't use otherwise. */ \ do { \ if ((a) != (b)) \ return ((a) < (b)) ? -1 : 1; \ } while (0) /* In the general case, direct pointer comparison is undefined behavior in C. * Avoid that by casting pointers to void* and then to uintptr_t. This comparison * is not really meaningful, except that it provides some kind of stable sort order * between pointers (that can otherwise not be compared). */ #define _NL_CMP_DIRECT_PTR(a, b) \ _NL_CMP_DIRECT(_nl_ptr_to_uintptr(a), _nl_ptr_to_uintptr(b)) #define _NL_CMP_DIRECT_BOOL(a, b) _NL_CMP_DIRECT(!!(a), !!(b)) #define _NL_CMP_DIRECT_MEMCMP(a, b, size) \ _NL_CMP_RETURN(_nl_memcmp((a), (b), (size))) #define _NL_CMP_DIRECT_STRCMP(a, b) _NL_CMP_RETURN_DIRECT(strcmp((a), (b))) #define _NL_CMP_DIRECT_STRCMP0(a, b) \ _NL_CMP_RETURN_DIRECT(_nl_strcmp0((a), (b))) #define _NL_CMP_DIRECT_STR_INTERNED(a, b) \ /* This is interned strings, which are first checked for equality only using pointer * comparison. Only in case of differences, the sort order is still determined by strcmp(). */ \ do { \ const char *const _a = (a); \ const char *const _b = (b); \ \ if (_a != _b) \ _NL_CMP_RETURN_DIRECT(_nl_strcmp0(_a, _b)); \ } while (0) #define _NL_CMP_DIRECT_IN6ADDR(a, b) \ do { \ const struct in6_addr *const _a = (a); \ const struct in6_addr *const _b = (b); \ \ _NL_CMP_RETURN(memcmp(_a, _b, sizeof(struct in6_addr))); \ } while (0) /*****************************************************************************/ #define _NL_CMP_FIELD(a, b, field) _NL_CMP_DIRECT(((a)->field), ((b)->field)) #define _NL_CMP_FIELD_UNSAFE(a, b, field) \ /* This variant is "unsafe", because it evaluates the arguments more then once. * This is only useful for bitfields, for which typeof() doesn't work. * Don't use otherwise. */ \ _NL_CMP_DIRECT_UNSAFE(((a)->field), ((b)->field)) #define _NL_CMP_FIELD_BOOL(a, b, field) \ _NL_CMP_DIRECT_BOOL(((a)->field), ((b)->field)) #define _NL_CMP_FIELD_STR(a, b, field) \ _NL_CMP_DIRECT_STRCMP(((a)->field), ((b)->field)) #define _NL_CMP_FIELD_STR0(a, b, field) \ _NL_CMP_DIRECT_STRCMP0(((a)->field), ((b)->field)) #define _NL_CMP_FIELD_STR_INTERNED(a, b, field) \ _NL_CMP_DIRECT_STR_INTERNED(((a)->field), ((b)->field)) #define _NL_CMP_FIELD_MEMCMP_LEN(a, b, field, len) \ _NL_CMP_DIRECT_MEMCMP(&((a)->field), &((b)->field), \ _NL_MIN(len, sizeof((a)->field))) #define _NL_CMP_FIELD_MEMCMP(a, b, field) \ _NL_CMP_DIRECT_MEMCMP(&((a)->field), &((b)->field), sizeof((a)->field)) #define _NL_CMP_FIELD_IN6ADDR(a, b, field) \ _NL_CMP_DIRECT_IN6ADDR(&((a)->field), &((b)->field)) /*****************************************************************************/ /* internal macro to calculate the size of a struct @type up to (and including) @field. * this will be used for .minlen policy fields, so that we require only a field of up * to the given size. */ #define _nl_offsetofend(type, field) \ (offsetof(type, field) + sizeof(((type *)NULL)->field)) /*****************************************************************************/ #define _nl_clear_pointer(pp, destroy) \ ({ \ __typeof__(*(pp)) *_pp = (pp); \ __typeof__(*_pp) _p; \ int _changed = 0; \ \ if (_pp && (_p = *_pp)) { \ _nl_unused const void *const _p_check_is_pointer = _p; \ \ *_pp = NULL; \ \ (destroy)(_p); \ \ _changed = 1; \ } \ _changed; \ }) #define _nl_clear_free(pp) _nl_clear_pointer(pp, free) #define _nl_steal_pointer(pp) \ ({ \ __typeof__(*(pp)) *const _pp = (pp); \ __typeof__(*_pp) _p = NULL; \ \ if (_pp && (_p = *_pp)) { \ *_pp = NULL; \ } \ \ _p; \ }) /*****************************************************************************/ #define _nl_malloc_maybe_a(alloca_maxlen, bytes, to_free) \ ({ \ const size_t _bytes = (bytes); \ __typeof__(to_free) _to_free = (to_free); \ __typeof__(*_to_free) _ptr; \ \ _NL_STATIC_ASSERT((alloca_maxlen) <= 500); \ _nl_assert(_to_free && !*_to_free); \ \ if (_bytes <= (alloca_maxlen)) { \ _ptr = alloca(_bytes); \ } else { \ _ptr = malloc(_bytes); \ *_to_free = _ptr; \ }; \ \ _ptr; \ }) /*****************************************************************************/ static inline char *_nl_strncpy_trunc(char *dst, const char *src, size_t len) { /* we don't use/reimplement strlcpy(), because we want the fill-all-with-NUL * behavior of strncpy(). This is just strncpy() with gracefully handling truncation * (and disabling the "-Wstringop-truncation" warning). * * Note that truncation is silently accepted. */ _NL_PRAGMA_WARNING_DISABLE("-Wstringop-truncation"); _NL_PRAGMA_WARNING_DISABLE("-Wstringop-overflow"); if (len > 0) { _nl_assert(dst); _nl_assert(src); strncpy(dst, src, len); dst[len - 1] = '\0'; } _NL_PRAGMA_WARNING_REENABLE; _NL_PRAGMA_WARNING_REENABLE; return dst; } static inline char *_nl_strncpy_assert(char *dst, const char *src, size_t len) { /* we don't use/reimplement strlcpy(), because we want the fill-all-with-NUL * behavior of strncpy(). This is just strncpy() with assertion against truncation * (and disabling the "-Wstringop-truncation" warning). * * Note that truncation is still a bug and there is an _nl_assert() * against that. */ _NL_PRAGMA_WARNING_DISABLE("-Wstringop-truncation"); _NL_PRAGMA_WARNING_DISABLE("-Wstringop-overflow"); if (len > 0) { _nl_assert(dst); _nl_assert(src); strncpy(dst, src, len); _nl_assert(dst[len - 1] == '\0'); dst[len - 1] = '\0'; } _NL_PRAGMA_WARNING_REENABLE; _NL_PRAGMA_WARNING_REENABLE; return dst; } #define _NL_RETURN_ON_ERR(cmd) \ do { \ int _err; \ \ _err = (cmd); \ if (_err < 0) \ return _err; \ } while (0) #define _NL_RETURN_E_ON_ERR(e, cmd) \ do { \ int _err; \ \ _err = (cmd); \ if (_err < 0) { \ _NL_STATIC_ASSERT((e) > 0); \ return -(e); \ } \ } while (0) /* _NL_RETURN_ON_PUT_ERR() shall only be used with a put command (nla_put or nlmsg_append). * These commands can either fail with a regular error code (which gets propagated) * or with -NLE_NOMEM. However, they don't really try to allocate memory, so we don't * want to propagate -NLE_NOMEM. Instead, we coerce such failure to -NLE_MSGSIZE. */ #define _NL_RETURN_ON_PUT_ERR(put_cmd) \ do { \ int _err; \ \ _err = (put_cmd); \ if (_err < 0) { \ if (_err == -NLE_NOMEM) { \ /* nla_put() returns -NLE_NOMEM in case of out of buffer size. We don't * want to propagate that error and map it to -NLE_MSGSIZE. */ \ return -NLE_MSGSIZE; \ } \ /* any other error can only be due to invalid parameters. Propagate the * error, however also assert that it cannot be reached. */ \ _nl_assert_not_reached(); \ return _err; \ } else \ _nl_assert(_err == 0); \ } while (0) static inline int _nl_close(int fd) { int r; r = close(fd); _nl_assert(r == 0 || fd < 0 || errno != EBADF); return r; } static inline void *_nl_memdup(const void *ptr, size_t len) { void *p; if (len == 0) { /* malloc() leaves it implementation defined whether to return NULL. * Callers rely on returning NULL if len is zero. */ return NULL; } p = malloc(len); if (!p) return NULL; memcpy(p, ptr, len); return p; } #define _nl_memdup_ptr(ptr) ((__typeof__(ptr))_nl_memdup((ptr), sizeof(*(ptr)))) /*****************************************************************************/ static inline size_t _nl_addr_family_to_size(int addr_family) { if (addr_family == AF_INET) return sizeof(in_addr_t); if (addr_family == AF_INET6) return sizeof(struct in6_addr); return 0; } /*****************************************************************************/ typedef union { in_addr_t addr4; struct in_addr a4; struct in6_addr a6; } _NLIPAddr; static inline char *_nl_inet_ntop(int addr_family, const void *addr, char *buf) { char *r; _nl_assert_addr_family(addr_family); _nl_assert(addr); /* inet_ntop() is documented to fail, but if we pass a known address family * and a suitably large buffer, it cannot. Assert for that. */ r = (char *)inet_ntop(addr_family, addr, buf, (addr_family == AF_INET) ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN); _nl_assert(r == buf); _nl_assert(strlen(r) < ((addr_family == AF_INET) ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN)); return r; } static inline char *_nl_inet_ntop_dup(int addr_family, const void *addr) { return (char *)_nl_inet_ntop(addr_family, addr, malloc((addr_family == AF_INET) ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN)); } /*****************************************************************************/ #define _NL_AUTO_DEFINE_FCN_VOID0(CastType, name, func) \ static inline void name(void *v) \ { \ if (*((CastType *)v)) \ func(*((CastType *)v)); \ } \ struct _nl_dummy_for_tailing_semicolon #define _NL_AUTO_DEFINE_FCN_STRUCT(CastType, name, func) \ static inline void name(CastType *v) \ { \ if (v) \ func(v); \ } \ struct _nl_dummy_for_tailing_semicolon #define _NL_AUTO_DEFINE_FCN_TYPED0(CastType, name, func) \ static inline void name(CastType *v) \ { \ if (*v) \ func(*v); \ } \ struct _nl_dummy_for_tailing_semicolon #define _NL_AUTO_DEFINE_FCN_INDIRECT0(CastType, name, func) \ static inline void name(CastType *v) \ { \ if (*v) \ func(v); \ } \ struct _nl_dummy_for_tailing_semicolon #define _nl_auto_free _nl_auto(_nl_auto_free_fcn) _NL_AUTO_DEFINE_FCN_VOID0(void *, _nl_auto_free_fcn, free); /*****************************************************************************/ #define NSEC_PER_SEC 1000000000L struct trans_tbl { uint64_t i; const char *a; }; #define __ADD(id, name) { .i = id, .a = #name } #define BUG() \ do { \ fprintf(stderr, "BUG at file position %s:%d:%s\n", __FILE__, \ __LINE__, __func__); \ assert(0); \ } while (0) #define BUG_ON(condition) \ do { \ if (condition) \ BUG(); \ } while (0) #define APPBUG(msg) \ do { \ fprintf(stderr, "APPLICATION BUG: %s:%d:%s: %s\n", __FILE__, \ __LINE__, __func__, msg); \ assert(0); \ } while (0) /*****************************************************************************/ #ifndef DISABLE_PTHREADS #define NL_LOCK(NAME) pthread_mutex_t(NAME) = PTHREAD_MUTEX_INITIALIZER #define NL_RW_LOCK(NAME) pthread_rwlock_t(NAME) = PTHREAD_RWLOCK_INITIALIZER static inline void nl_lock(pthread_mutex_t *lock) { pthread_mutex_lock(lock); } static inline void nl_unlock(pthread_mutex_t *lock) { pthread_mutex_unlock(lock); } static inline void nl_read_lock(pthread_rwlock_t *lock) { pthread_rwlock_rdlock(lock); } static inline void nl_read_unlock(pthread_rwlock_t *lock) { pthread_rwlock_unlock(lock); } static inline void nl_write_lock(pthread_rwlock_t *lock) { pthread_rwlock_wrlock(lock); } static inline void nl_write_unlock(pthread_rwlock_t *lock) { pthread_rwlock_unlock(lock); } #else #define NL_LOCK(NAME) int __unused_lock_##NAME _nl_unused #define NL_RW_LOCK(NAME) int __unused_lock_##NAME _nl_unused #define nl_lock(LOCK) \ do { \ } while (0) #define nl_unlock(LOCK) \ do { \ } while (0) #define nl_read_lock(LOCK) \ do { \ } while (0) #define nl_read_unlock(LOCK) \ do { \ } while (0) #define nl_write_lock(LOCK) \ do { \ } while (0) #define nl_write_unlock(LOCK) \ do { \ } while (0) #endif #endif /* __NETLINK_BASE_NL_BASE_UTILS_H__ */