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 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 <pulsecore/log.h>
  34 #include <pulse/gccmacro.h>
  35
  36 #ifndef PACKAGE
  37 #error "Please include config.h before including this file!"
  38 #endif
  39
  40 #ifndef PA_LIKELY
  41 #ifdef __GNUC__
  42 #define PA_LIKELY(x) (__builtin_expect(!!(x),1))
  43 #define PA_UNLIKELY(x) (__builtin_expect((x),0))
  44 #else
  45 #define PA_LIKELY(x) (x)
  46 #define PA_UNLIKELY(x) (x)
  47 #endif
  48 #endif
  49
  50 #if defined(PAGE_SIZE)
  51 #define PA_PAGE_SIZE ((size_t) PAGE_SIZE)
  52 #elif defined(PAGESIZE)
  53 #define PA_PAGE_SIZE ((size_t) PAGESIZE)
  54 #elif defined(HAVE_SYSCONF)
  55 #define PA_PAGE_SIZE ((size_t) (sysconf(_SC_PAGE_SIZE)))
  56 #else
  57 /* Let's hope it's like x86. */
  58 #define PA_PAGE_SIZE ((size_t) 4096)
  59 #endif
  60
  61 static inline size_t pa_align(size_t l) {
  62     return (((l + sizeof(void*) - 1) / sizeof(void*)) * sizeof(void*));
  63 }
  64 #define PA_ALIGN(x) (pa_align(x))
  65
  66 static inline void* pa_page_align_ptr(const void *p) {
  67     return (void*) (((size_t) p) & ~(PA_PAGE_SIZE-1));
  68 }
  69 #define PA_PAGE_ALIGN_PTR(x) (pa_page_align_ptr(x))
  70
  71 static inline size_t pa_page_align(size_t l) {
  72     return l & ~(PA_PAGE_SIZE-1);
  73 }
  74 #define PA_PAGE_ALIGN(x) (pa_page_align(x))
  75
  76 #define PA_ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
  77
  78 /* The users of PA_MIN and PA_MAX should be aware that these macros on
  79  * non-GCC executed code with side effects twice. It is thus
  80  * considered misuse to use code with side effects as arguments to MIN
  81  * and MAX. */
  82
  83 #ifdef __GNUC__
  84 #define PA_MAX(a,b)                             \
  85     __extension__ ({ typeof(a) _a = (a);        \
  86             typeof(b) _b = (b);                 \
  87             _a > _b ? _a : _b;                  \
  88         })
  89 #else
  90 #define PA_MAX(a, b) ((a) > (b) ? (a) : (b))
  91 #endif
  92
  93 #ifdef __GNUC__
  94 #define PA_MIN(a,b)                             \
  95     __extension__ ({ typeof(a) _a = (a);        \
  96             typeof(b) _b = (b);                 \
  97             _a < _b ? _a : _b;                  \
  98         })
  99 #else
 100 #define PA_MIN(a, b) ((a) < (b) ? (a) : (b))
 101 #endif
 102
 103 #ifdef __GNUC__
 104 #define PA_CLAMP(x, low, high)                                          \
 105     __extension__ ({ typeof(x) _x = (x);                                \
 106             typeof(low) _low = (low);                                   \
 107             typeof(high) _high = (high);                                \
 108             ((_x > _high) ? _high : ((_x < _low) ? _low : _x));         \
 109         })
 110 #else
 111 #define PA_CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
 112 #endif
 113
 114 #ifdef __GNUC__
 115 #define PA_CLAMP_UNLIKELY(x, low, high)                                 \
 116     __extension__ ({ typeof(x) _x = (x);                                \
 117             typeof(low) _low = (low);                                   \
 118             typeof(high) _high = (high);                                \
 119             (PA_UNLIKELY(_x > _high) ? _high : (PA_UNLIKELY(_x < _low) ? _low : _x)); \
 120         })
 121 #else
 122 #define PA_CLAMP_UNLIKELY(x, low, high) (PA_UNLIKELY((x) > (high)) ? (high) : (PA_UNLIKELY((x) < (low)) ? (low) : (x)))
 123 #endif
 124
 125 /* We don't define a PA_CLAMP_LIKELY here, because it doesn't really
 126  * make sense: we cannot know if it is more likely that the values is
 127  * lower or greater than the boundaries.*/
 128
 129 /* This type is not intended to be used in exported APIs! Use classic "int" there! */
 130 #ifdef HAVE_STD_BOOL
 131 typedef _Bool pa_bool_t;
 132 #else
 133 typedef int pa_bool_t;
 134 #endif
 135
 136 #ifndef FALSE
 137 #define FALSE ((pa_bool_t) 0)
 138 #endif
 139
 140 #ifndef TRUE
 141 #define TRUE (!FALSE)
 142 #endif
 143
 144 #ifdef __GNUC__
 145 #define PA_PRETTY_FUNCTION __PRETTY_FUNCTION__
 146 #else
 147 #define PA_PRETTY_FUNCTION ""
 148 #endif
 149
 150 #define pa_return_if_fail(expr)                                         \
 151     do {                                                                \
 152         if (PA_UNLIKELY(!(expr))) {                                     \
 153             pa_log_debug("Assertion '%s' failed at %s:%u, function %s.\n", #expr , __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 154             return;                                                     \
 155         }                                                               \
 156     } while(FALSE)
 157
 158 #define pa_return_val_if_fail(expr, val)                                \
 159     do {                                                                \
 160         if (PA_UNLIKELY(!(expr))) {                                     \
 161             pa_log_debug("Assertion '%s' failed at %s:%u, function %s.\n", #expr , __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 162             return (val);                                               \
 163         }                                                               \
 164     } while(FALSE)
 165
 166 #define pa_return_null_if_fail(expr) pa_return_val_if_fail(expr, NULL)
 167
 168 /* An assert which guarantees side effects of x, i.e. is never
 169  * optimized away */
 170 #define pa_assert_se(expr)                                              \
 171     do {                                                                \
 172         if (PA_UNLIKELY(!(expr))) {                                     \
 173             pa_log_error("Assertion '%s' failed at %s:%u, function %s(). Aborting.", #expr , __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 174             abort();                                                    \
 175         }                                                               \
 176     } while (FALSE)
 177
 178 /* An assert that may be optimized away by defining NDEBUG */
 179 #ifdef NDEBUG
 180 #define pa_assert(expr) do {} while (FALSE)
 181 #else
 182 #define pa_assert(expr) pa_assert_se(expr)
 183 #endif
 184
 185 #define pa_assert_not_reached()                                         \
 186     do {                                                                \
 187         pa_log_error("Code should not be reached at %s:%u, function %s(). Aborting.", __FILE__, __LINE__, PA_PRETTY_FUNCTION); \
 188         abort();                                                        \
 189     } while (FALSE)
 190
 191 #define PA_PTR_TO_UINT(p) ((unsigned int) (unsigned long) (p))
 192 #define PA_UINT_TO_PTR(u) ((void*) (unsigned long) (u))
 193
 194 #define PA_PTR_TO_UINT32(p) ((uint32_t) PA_PTR_TO_UINT(p))
 195 #define PA_UINT32_TO_PTR(u) PA_UINT_TO_PTR((uint32_t) u)
 196
 197 #define PA_PTR_TO_INT(p) ((int) PA_PTR_TO_UINT(p))
 198 #define PA_INT_TO_PTR(u) PA_UINT_TO_PTR((int) u)
 199
 200 #define PA_PTR_TO_INT32(p) ((int32_t) PA_PTR_TO_UINT(p))
 201 #define PA_INT32_TO_PTR(u) PA_UINT_TO_PTR((int32_t) u)
 202
 203 #ifdef OS_IS_WIN32
 204 #define PA_PATH_SEP "\\"
 205 #define PA_PATH_SEP_CHAR '\\'
 206 #else
 207 #define PA_PATH_SEP "/"
 208 #define PA_PATH_SEP_CHAR '/'
 209 #endif
 210
 211 #ifdef __GNUC__
 212
 213 #define PA_WARN_REFERENCE(sym, msg)                  \
 214     __asm__(".section .gnu.warning." #sym);          \
 215     __asm__(".asciz \"" msg "\"");                   \
 216     __asm__(".previous")
 217
 218 #else
 219
 220 #define PA_WARN_REFERENCE(sym, msg)
 221
 222 #endif
 223
 224 #endif