code.delx.au - pulseaudio/blob - src/pulsecore/macro.h

   1 #ifndef foopulsemacrohfoo
   2 #define foopulsemacrohfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2.1 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #include <sys/types.h>
  26 #include <unistd.h>
  27 #include <assert.h>
  28 #include <limits.h>
  29 #include <unistd.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32
  33 #include <pulse/gccmacro.h>
  34
  35 #ifndef PACKAGE
  36 #error "Please include config.h before including this file!"
  37 #endif
  38
  39 #ifndef PA_LIKELY
  40 #ifdef __GNUC__
  41 #define PA_LIKELY(x) (__builtin_expect(!!(x),1))
  42 #define PA_UNLIKELY(x) (__builtin_expect(!!(x),0))
  43 #else
  44 #define PA_LIKELY(x) (x)
  45 #define PA_UNLIKELY(x) (x)
  46 #endif
  47 #endif
  48
  49 #if defined(PAGE_SIZE)
  50 #define PA_PAGE_SIZE ((size_t) PAGE_SIZE)
  51 #elif defined(PAGESIZE)
  52 #define PA_PAGE_SIZE ((size_t) PAGESIZE)
  53 #elif defined(HAVE_SYSCONF)
  54 #define PA_PAGE_SIZE ((size_t) (sysconf(_SC_PAGE_SIZE)))
  55 #else
  56 /* Let's hope it's like x86. */
  57 #define PA_PAGE_SIZE ((size_t) 4096)
  58 #endif
  59
  60 static inline size_t pa_align(size_t l) {
  61     return (((l + sizeof(void*) - 1) / sizeof(void*)) * sizeof(void*));
  62 }
  63 #define PA_ALIGN(x) (pa_align(x))
  64
  65 static inline void* pa_page_align_ptr(const void *p) {
  66     return (void*) (((size_t) p) & ~(PA_PAGE_SIZE-1));
  67 }
  68 #define PA_PAGE_ALIGN_PTR(x) (pa_page_align_ptr(x))
  69
  70 static inline size_t pa_page_align(size_t l) {
  71     return l & ~(PA_PAGE_SIZE-1);
  72 }
  73 #define PA_PAGE_ALIGN(x) (pa_page_align(x))
  74
  75 #define PA_ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
  76
  77 /* The users of PA_MIN and PA_MAX should be aware that these macros on
  78  * non-GCC executed code with side effects twice. It is thus
  79  * considered misuse to use code with side effects as arguments to MIN
  80  * and MAX. */
  81
  82 #ifdef __GNUC__
  83 #define PA_MAX(a,b)                             \
  84     __extension__ ({ typeof(a) _a = (a);        \
  85             typeof(b) _b = (b);                 \
  86             _a > _b ? _a : _b;                  \
  87         })
  88 #else
  89 #define PA_MAX(a, b) ((a) > (b) ? (a) : (b))
  90 #endif
  91
  92 #ifdef __GNUC__
  93 #define PA_MIN(a,b)                             \
  94     __extension__ ({ typeof(a) _a = (a);        \
  95             typeof(b) _b = (b);                 \
  96             _a < _b ? _a : _b;                  \
  97         })
  98 #else
  99 #define PA_MIN(a, b) ((a) < (b) ? (a) : (b))
 100 #endif
 101
 102 #ifdef __GNUC__
 103 #define PA_CLAMP(x, low, high)                                          \
 104     __extension__ ({ typeof(x) _x = (x);                                \
 105             typeof(low) _low = (low);                                   \
 106             typeof(high) _high = (high);                                \
 107             ((_x > _high) ? _high : ((_x < _low) ? _low : _x));         \
 108         })
 109 #else
 110 #define PA_CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
 111 #endif
 112
 113 #ifdef __GNUC__
 114 #define PA_CLAMP_UNLIKELY(x, low, high)                                 \
 115     __extension__ ({ typeof(x) _x = (x);                                \
 116             typeof(low) _low = (low);                                   \
 117             typeof(high) _high = (high);                                \
 118             (PA_UNLIKELY(_x > _high) ? _high : (PA_UNLIKELY(_x < _low) ? _low : _x)); \
 119         })
 120 #else
 121 #define PA_CLAMP_UNLIKELY(x, low, high) (PA_UNLIKELY((x) > (high)) ? (high) : (PA_UNLIKELY((x) < (low)) ? (low) : (x)))
 122 #endif
 123
 124 /* We don't define a PA_CLAMP_LIKELY here, because it doesn't really
 125  * make sense: we cannot know if it is more likely that the values is
 126  * lower or greater than the boundaries.*/
 127
 128 /* This type is not intended to be used in exported APIs! Use classic "int" there! */
 129 #ifdef HAVE_STD_BOOL
 130 typedef _Bool pa_bool_t;
 131 #else
 132 typedef int pa_bool_t;
 133 #endif
 134
 135 #ifndef FALSE
 136 #define FALSE ((pa_bool_t) 0)
 137 #endif
 138
 139 #ifndef TRUE
 140 #define TRUE (!FALSE)
 141 #endif
 142
 143 #ifdef __GNUC__
 144 #define PA_PRETTY_FUNCTION __PRETTY_FUNCTION__
 145 #else
 146 #define PA_PRETTY_FUNCTION ""
 147 #endif
 148
 149 #define pa_return_if_fail(expr)                                         \
 150     do {                                                                \
 151         if (PA_UNLIKELY(!(expr))) {                                     \
 152             pa_log_debug("Assertion '%s' failed at %s:%u, function %s.\n", #expr , __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 153             return;                                                     \
 154         }                                                               \
 155     } while(FALSE)
 156
 157 #define pa_return_val_if_fail(expr, val)                                \
 158     do {                                                                \
 159         if (PA_UNLIKELY(!(expr))) {                                     \
 160             pa_log_debug("Assertion '%s' failed at %s:%u, function %s.\n", #expr , __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 161             return (val);                                               \
 162         }                                                               \
 163     } while(FALSE)
 164
 165 #define pa_return_null_if_fail(expr) pa_return_val_if_fail(expr, NULL)
 166
 167 /* pa_assert_se() is an assert which guarantees side effects of x,
 168  * i.e. is never optimized away, regardless of NDEBUG or FASTPATH. */
 169 #define pa_assert_se(expr)                                              \
 170     do {                                                                \
 171         if (PA_UNLIKELY(!(expr))) {                                     \
 172             pa_log_error("Assertion '%s' failed at %s:%u, function %s(). Aborting.", #expr , __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 173             abort();                                                    \
 174         }                                                               \
 175     } while (FALSE)
 176
 177 /* Does exactly nothing */
 178 #define pa_nop() do {} while (FALSE)
 179
 180 /* pa_assert() is an assert that may be optimized away by defining
 181  * NDEBUG. pa_assert_fp() is an assert that may be optimized away by
 182  * defining FASTPATH. It is supposed to be used in inner loops. It's
 183  * there for extra paranoia checking and should probably be removed in
 184  * production builds. */
 185 #ifdef NDEBUG
 186 #define pa_assert(expr) pa_nop()
 187 #define pa_assert_fp(expr) pa_nop()
 188 #elif defined (FASTPATH)
 189 #define pa_assert(expr) pa_assert_se(expr)
 190 #define pa_assert_fp(expr) pa_nop()
 191 #else
 192 #define pa_assert(expr) pa_assert_se(expr)
 193 #define pa_assert_fp(expr) pa_assert_se(expr)
 194 #endif
 195
 196 #define pa_assert_not_reached()                                         \
 197     do {                                                                \
 198         pa_log_error("Code should not be reached at %s:%u, function %s(). Aborting.", __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 199         abort();                                                        \
 200     } while (FALSE)
 201
 202 #define PA_PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
 203 #define PA_UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
 204
 205 #define PA_PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
 206 #define PA_UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
 207
 208 #define PA_PTR_TO_INT(p) ((int) ((intptr_t) (p)))
 209 #define PA_INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
 210
 211 #define PA_PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
 212 #define PA_INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))
 213
 214 #ifdef OS_IS_WIN32
 215 #define PA_PATH_SEP "\\"
 216 #define PA_PATH_SEP_CHAR '\\'
 217 #else
 218 #define PA_PATH_SEP "/"
 219 #define PA_PATH_SEP_CHAR '/'
 220 #endif
 221
 222 #if defined(__GNUC__) && defined(__ELF__)
 223
 224 #define PA_WARN_REFERENCE(sym, msg)                  \
 225     __asm__(".section .gnu.warning." #sym);          \
 226     __asm__(".asciz \"" msg "\"");                   \
 227     __asm__(".previous")
 228
 229 #else
 230
 231 #define PA_WARN_REFERENCE(sym, msg)
 232
 233 #endif
 234
 235 #if defined(__i386__) || defined(__x86_64__)
 236 #define PA_DEBUG_TRAP __asm__("int $3")
 237 #else
 238 #define PA_DEBUG_TRAP raise(SIGTRAP)
 239 #endif
 240
 241 /* We include this at the very last place */
 242 #include <pulsecore/log.h>
 243
 244 #endif