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authorAnthony G. Basile <blueness@gentoo.org>2014-08-05 19:22:24 -0400
committerAnthony G. Basile <blueness@gentoo.org>2014-08-05 19:22:24 -0400
commitb1ac60946d1625e14029ea9b7fa3aa4c06e0795f (patch)
tree28cdd75fec8c6c6a2cf69c9668add048c10370f8 /src/shared/macro.h
parent4b8733ffe9c0fe8e5a527186d323dab93e43fb37 (diff)
src/shared: refactor shared code
Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
Diffstat (limited to 'src/shared/macro.h')
-rw-r--r--src/shared/macro.h201
1 files changed, 201 insertions, 0 deletions
diff --git a/src/shared/macro.h b/src/shared/macro.h
new file mode 100644
index 0000000000..2deaf04092
--- /dev/null
+++ b/src/shared/macro.h
@@ -0,0 +1,201 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <inttypes.h>
+
+#define _printf_(a,b) __attribute__ ((format (printf, a, b)))
+#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
+#define _sentinel_ __attribute__ ((sentinel))
+#define _pure_ __attribute__ ((pure))
+#define _const_ __attribute__ ((const))
+#define _packed_ __attribute__ ((packed))
+#define _malloc_ __attribute__ ((malloc))
+#define _likely_(x) (__builtin_expect(!!(x),1))
+#define _unlikely_(x) (__builtin_expect(!!(x),0))
+#define _public_ __attribute__ ((visibility("default")))
+#define _cleanup_(x) __attribute__((cleanup(x)))
+
+
+#define DISABLE_WARNING_FORMAT_NONLITERAL \
+ _Pragma("GCC diagnostic push"); \
+ _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
+
+#define REENABLE_WARNING \
+ _Pragma("GCC diagnostic pop")
+
+/* Rounds up */
+
+#define ALIGN4(l) (((l) + 3) & ~3)
+#define ALIGN8(l) (((l) + 7) & ~7)
+
+#if __SIZEOF_POINTER__ == 8
+#define ALIGN(l) ALIGN8(l)
+#elif __SIZEOF_POINTER__ == 4
+#define ALIGN(l) ALIGN4(l)
+#else
+#error "Wut? Pointers are neither 4 nor 8 bytes long?"
+#endif
+
+static inline size_t ALIGN_TO(size_t l, size_t ali) {
+ return ((l + ali - 1) & ~(ali - 1));
+}
+
+
+#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
+
+/*
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr: the pointer to the member.
+ * @type: the type of the container struct this is embedded in.
+ * @member: the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) \
+ __extension__ ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) ); \
+ })
+
+#define assert_se(expr) \
+ do { \
+ if (_unlikely_(!(expr))) \
+ log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
+ } while (false) \
+
+/* We override the glibc assert() here. */
+#undef assert
+#ifdef NDEBUG
+#define assert(expr) do {} while(false)
+#else
+#define assert(expr) assert_se(expr)
+#endif
+
+#define assert_not_reached(t) \
+ do { \
+ log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
+ } while (false)
+
+#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
+#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
+#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
+#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
+
+#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
+#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
+#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
+#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
+
+#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
+#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
+#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
+#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
+
+#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
+#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
+#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
+#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
+
+#define memzero(x,l) (memset((x), 0, (l)))
+
+#define char_array_0(x) x[sizeof(x)-1] = 0;
+
+#define IOVEC_SET_STRING(i, s) \
+ do { \
+ struct iovec *_i = &(i); \
+ char *_s = (char *)(s); \
+ _i->iov_base = _s; \
+ _i->iov_len = strlen(_s); \
+ } while(false)
+
+static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
+ unsigned j;
+ size_t r = 0;
+
+ for (j = 0; j < n; j++)
+ r += i[j].iov_len;
+
+ return r;
+}
+
+static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
+ unsigned j;
+
+ for (j = 0; j < n; j++) {
+ size_t sub;
+
+ if (_unlikely_(k <= 0))
+ break;
+
+ sub = MIN(i[j].iov_len, k);
+ i[j].iov_len -= sub;
+ i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
+ k -= sub;
+ }
+
+ return k;
+}
+
+ /* Because statfs.t_type can be int on some architecures, we have to cast
+ * the const magic to the type, otherwise the compiler warns about
+ * signed/unsigned comparison, because the magic can be 32 bit unsigned.
+ */
+#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
+
+/* Returns the number of chars needed to format variables of the
+ * specified type as a decimal string. Adds in extra space for a
+ * negative '-' prefix. */
+#define DECIMAL_STR_MAX(type) \
+ (2+(sizeof(type) <= 1 ? 3 : \
+ sizeof(type) <= 2 ? 5 : \
+ sizeof(type) <= 4 ? 10 : \
+ sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
+
+/* Define C11 thread_local attribute even on older gcc compiler
+ * version */
+#ifndef 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
+ */
+#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
+#define thread_local _Thread_local
+#else
+#define thread_local __thread
+#endif
+#endif
+
+/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
+ * compiler versions */
+#ifndef noreturn
+#if __STDC_VERSION__ >= 201112L
+#define noreturn _Noreturn
+#else
+#define noreturn __attribute__((noreturn))
+#endif
+#endif
+
+#include "log.h"