src/pulsecore/core-util.h

   1 #ifndef foocoreutilhfoo
   2 #define foocoreutilhfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8   Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as
  12   published by the Free Software Foundation; either version 2.1 of the
  13   License, or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public
  21   License along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #include <sys/types.h>
  27 #include <inttypes.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 #ifdef HAVE_SYS_RESOURCE_H
  33 #include <sys/resource.h>
  34 #endif
  35
  36 #include <pulse/gccmacro.h>
  37 #include <pulsecore/macro.h>
  38
  39 #ifndef PACKAGE
  40 #error "Please include config.h before including this file!"
  41 #endif
  42
  43 struct timeval;
  44
  45 /* These resource limits are pretty new on Linux, let's define them
  46  * here manually, in case the kernel is newer than the glibc */
  47 #if !defined(RLIMIT_NICE) && defined(__linux__)
  48 #define RLIMIT_NICE 13
  49 #endif
  50 #if !defined(RLIMIT_RTPRIO) && defined(__linux__)
  51 #define RLIMIT_RTPRIO 14
  52 #endif
  53 #if !defined(RLIMIT_RTTIME) && defined(__linux__)
  54 #define RLIMIT_RTTIME 15
  55 #endif
  56
  57 void pa_make_fd_nonblock(int fd);
  58 void pa_make_fd_cloexec(int fd);
  59
  60 int pa_make_secure_dir(const char* dir, mode_t m, uid_t uid, gid_t gid);
  61 int pa_make_secure_parent_dir(const char *fn, mode_t, uid_t uid, gid_t gid);
  62
  63 ssize_t pa_read(int fd, void *buf, size_t count, int *type);
  64 ssize_t pa_write(int fd, const void *buf, size_t count, int *type);
  65 ssize_t pa_loop_read(int fd, void*data, size_t size, int *type);
  66 ssize_t pa_loop_write(int fd, const void*data, size_t size, int *type);
  67
  68 int pa_close(int fd);
  69
  70 void pa_check_signal_is_blocked(int sig);
  71
  72 char *pa_sprintf_malloc(const char *format, ...) PA_GCC_PRINTF_ATTR(1,2);
  73 char *pa_vsprintf_malloc(const char *format, va_list ap);
  74
  75 char *pa_strlcpy(char *b, const char *s, size_t l);
  76
  77 char *pa_parent_dir(const char *fn);
  78
  79 int pa_make_realtime(int rtprio);
  80 int pa_raise_priority(int nice_level);
  81 void pa_reset_priority(void);
  82
  83 pa_bool_t pa_can_realtime(void);
  84 pa_bool_t pa_can_high_priority(void);
  85
  86 int pa_parse_boolean(const char *s) PA_GCC_PURE;
  87
  88 static inline const char *pa_yes_no(pa_bool_t b) {
  89     return b ? "yes" : "no";
  90 }
  91
  92 static inline const char *pa_strnull(const char *x) {
  93     return x ? x : "(null)";
  94 }
  95
  96 static inline const char *pa_strempty(const char *x) {
  97     return x ? x : "";
  98 }
  99
 100 char *pa_split(const char *c, const char*delimiters, const char **state);
 101 char *pa_split_spaces(const char *c, const char **state);
 102
 103 char *pa_strip_nl(char *s);
 104
 105 const char *pa_sig2str(int sig) PA_GCC_PURE;
 106
 107 int pa_own_uid_in_group(const char *name, gid_t *gid);
 108 int pa_uid_in_group(uid_t uid, const char *name);
 109 gid_t pa_get_gid_of_group(const char *name);
 110 int pa_check_in_group(gid_t g);
 111
 112 int pa_lock_fd(int fd, int b);
 113
 114 int pa_lock_lockfile(const char *fn);
 115 int pa_unlock_lockfile(const char *fn, int fd);
 116
 117 char *pa_hexstr(const uint8_t* d, size_t dlength, char *s, size_t slength);
 118 size_t pa_parsehex(const char *p, uint8_t *d, size_t dlength);
 119
 120 pa_bool_t pa_startswith(const char *s, const char *pfx) PA_GCC_PURE;
 121 pa_bool_t pa_endswith(const char *s, const char *sfx) PA_GCC_PURE;
 122
 123 FILE *pa_open_config_file(const char *global, const char *local, const char *env, char **result);
 124 char* pa_find_config_file(const char *global, const char *local, const char *env);
 125
 126 char *pa_get_runtime_dir(void);
 127 char *pa_get_state_dir(void);
 128 char *pa_runtime_path(const char *fn);
 129 char *pa_state_path(const char *fn, pa_bool_t prepend_machine_id);
 130
 131 int pa_atoi(const char *s, int32_t *ret_i);
 132 int pa_atou(const char *s, uint32_t *ret_u);
 133 int pa_atod(const char *s, double *ret_d);
 134
 135 size_t pa_snprintf(char *str, size_t size, const char *format, ...);
 136 size_t pa_vsnprintf(char *str, size_t size, const char *format, va_list ap);
 137
 138 char *pa_truncate_utf8(char *c, size_t l);
 139
 140 char *pa_getcwd(void);
 141 char *pa_make_path_absolute(const char *p);
 142 pa_bool_t pa_is_path_absolute(const char *p);
 143
 144 void *pa_will_need(const void *p, size_t l);
 145
 146 static inline int pa_is_power_of_two(unsigned n) {
 147     return !(n & (n - 1));
 148 }
 149
 150 static inline unsigned pa_ulog2(unsigned n) {
 151
 152     if (n <= 1)
 153         return 0;
 154
 155 #if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
 156     return 8U * (unsigned) sizeof(unsigned) - (unsigned) __builtin_clz(n) - 1;
 157 #else
 158 {
 159     unsigned r = 0;
 160
 161     for (;;) {
 162         n = n >> 1;
 163
 164         if (!n)
 165             return r;
 166
 167         r++;
 168     }
 169 }
 170 #endif
 171 }
 172
 173 static inline unsigned pa_make_power_of_two(unsigned n) {
 174
 175     if (pa_is_power_of_two(n))
 176         return n;
 177
 178     return 1U << (pa_ulog2(n) + 1);
 179 }
 180
 181 void pa_close_pipe(int fds[2]);
 182
 183 char *pa_readlink(const char *p);
 184
 185 int pa_close_all(int except_fd, ...);
 186 int pa_close_allv(const int except_fds[]);
 187 int pa_unblock_sigs(int except, ...);
 188 int pa_unblock_sigsv(const int except[]);
 189 int pa_reset_sigs(int except, ...);
 190 int pa_reset_sigsv(const int except[]);
 191
 192 void pa_set_env(const char *key, const char *value);
 193
 194 pa_bool_t pa_in_system_mode(void);
 195
 196 #define pa_streq(a,b) (!strcmp((a),(b)))
 197
 198 char *pa_machine_id(void);
 199 char *pa_uname_string(void);
 200
 201
 202 #ifdef HAVE_VALGRIND_MEMCHECK_H
 203 pa_bool_t pa_in_valgrind(void);
 204 #else
 205 static inline pa_bool_t pa_in_valgrind(void) {
 206     return FALSE;
 207 }
 208 #endif
 209
 210 unsigned pa_gcd(unsigned a, unsigned b);
 211 void pa_reduce(unsigned *num, unsigned *den);
 212
 213 #endif