Yes, yet another evil all-in-one commit of intervowen changes. I suck.

* Drop "state" directory, fold that into "runtime directory"
* No longer automatically rewind when a new stream connects
* Rework sound file stream, to cause a rewind on initialisation, shorten _pop() code a bit
* Fix reference counting of pa_socket_server in the protocol implementations
* Rework daemon initialization code to be compatible with non-SUID-root setups where RLIMIT_RTPRIO is non-zero
* Print warning if RT/HP is enabled in the config, but due to missing caps, rlimits, policy we cannot enable it.
* Fix potential memory leak in pa_open_config_file()
* Add pa_find_config_file() which works much like pa_open_config_file() but doesn't actually open the config file in question. Just searches for it.
* Add portable pa_is_path_absolute()
* Add pa_close_all() and use it on daemon startup to close leaking file descriptors (inspired from what I did for libdaemon)
* Add pa_unblock_sigs() and use it on daemon startup to unblock all signals (inspired from libdaemon, too)
* Add pa_reset_sigs() and use it on daemon startup to reset all signal handlers (inspired from libdaemon as well)
* Implement pa_set_env()
* Define RLIMIT_RTTIME and friends if not defined by glibc
* Add pa_strempty()
* rename state testing macros to include _IS_, to make clearer that they are no states, but testing macros
* Implement pa_source_output_set_requested_latency_within_thread() to be able to forward latency info to sources from within the IO thread
* Similar for sink inputs
* generelize since_underrun counter in sink inputs to "playing_for" and "underrun_for". Use only this for ignore potential rewind requests over underruns
* Add new native protocol message PLAYBACK_STREAM_MESSAGE_STARTED for notification about the end of an underrun
* Port native protocol to use underrun_for/playing_for which is maintained by the sink input anyway
* Pass underrun_for/playing_for in timing info to client
* Drop pa_sink_skip() since it breaks underrun detection code
* Move PID file and unix sockets to the runtime dir (i.e. ~/.pulse). This fixes a potention DoS attack from other users stealing dirs in /tmp from us so that we cannot take them anymore)
* Allow setting of more resource limits from the config file. Set RTTIME by default
* Streamline daemon startup code
* Rework algorithm to find default configuration files
* If run in system mode use "system.pa" instead of "default.pa" as default script file
* Change ladspa sink to use pa_clamp_samples() for clamping samples
* Teach module-null-sink how to deal with rewinding
* Try to support ALSA devices with no implicit channel map. Synthesize one by padding with PA_CHANNEL_POSITION_AUX channels. This is not tested since I lack hardware with these problems.
* Make use of time smoother in the client libraries.
* Add new pa_stream_is_corked() and pa_stream_set_started_callback() functions to public API
* Since our native socket moved, add some code for finding sockets created by old versions of PA. This should ease upgrades


git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2329 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/pulsecore/core-util.h

@@ -30,11 +30,27 @@
 #include <stdarg.h>
 #include <stdio.h>
 
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
 #include <pulse/gccmacro.h>
 #include <pulsecore/macro.h>
 
 struct timeval;
 
+/* These resource limits are pretty new on Linux, let's define them
+ * here manually, in case the kernel is newer than the glibc */
+#if !defined(RLIMIT_NICE) && defined(__linux__)
+#define RLIMIT_NICE 13
+#endif
+#if !defined(RLIMIT_RTPRIO) && defined(__linux__)
+#define RLIMIT_RTPRIO 14
+#endif
+#if !defined(RLIMIT_RTTIME) && defined(__linux__)
+#define RLIMIT_RTTIME 15
+#endif
+
 void pa_make_fd_nonblock(int fd);
 void pa_make_fd_cloexec(int fd);
 
@@ -61,6 +77,9 @@ int pa_make_realtime(int rtprio);
 int pa_raise_priority(int nice_level);
 void pa_reset_priority(void);
 
+pa_bool_t pa_can_realtime(void);
+pa_bool_t pa_can_high_priority(void);
+
 int pa_parse_boolean(const char *s) PA_GCC_PURE;
 
 static inline const char *pa_yes_no(pa_bool_t b) {
@@ -71,6 +90,10 @@ static inline const char *pa_strnull(const char *x) {
     return x ? x : "(null)";
 }
 
+static inline const char *pa_strempty(const char *x) {
+    return x ? x : "";
+}
+
 char *pa_split(const char *c, const char*delimiters, const char **state);
 char *pa_split_spaces(const char *c, const char **state);
 
@@ -88,15 +111,17 @@ int pa_lock_fd(int fd, int b);
 int pa_lock_lockfile(const char *fn);
 int pa_unlock_lockfile(const char *fn, int fd);
 
-FILE *pa_open_config_file(const char *global, const char *local, const char *env, char **result, const char *mode);
-
 char *pa_hexstr(const uint8_t* d, size_t dlength, char *s, size_t slength);
 size_t pa_parsehex(const char *p, uint8_t *d, size_t dlength);
 
 int pa_startswith(const char *s, const char *pfx) PA_GCC_PURE;
 int pa_endswith(const char *s, const char *sfx) PA_GCC_PURE;
 
-char *pa_runtime_path(const char *fn, char *s, size_t l);
+FILE *pa_open_config_file(const char *global, const char *local, const char *env, char **result);
+char* pa_find_config_file(const char *global, const char *local, const char *env);
+
+char *pa_get_runtime_dir(void);
+char *pa_runtime_path(const char *fn);
 
 int pa_atoi(const char *s, int32_t *ret_i);
 int pa_atou(const char *s, uint32_t *ret_u);
@@ -108,6 +133,7 @@ char *pa_truncate_utf8(char *c, size_t l);
 
 char *pa_getcwd(void);
 char *pa_make_path_absolute(const char *p);
+pa_bool_t pa_is_path_absolute(const char *p);
 
 void *pa_will_need(const void *p, size_t l);
 
@@ -133,6 +159,13 @@ void pa_close_pipe(int fds[2]);
 
 char *pa_readlink(const char *p);
 
-char *pa_get_state_dir(void);
+int pa_close_all(int except_fd, ...);
+int pa_close_allv(const int except_fds[]);
+int pa_unblock_sigs(int except, ...);
+int pa_unblock_sigsv(const int except[]);
+int pa_reset_sigs(int except, ...);
+int pa_reset_sigsv(const int except[]);
+
+void pa_set_env(const char *key, const char *value);
 
 #endif