Add initial infrastructure for Profiling

The EosProfileProbe API allows defining profiling probes that can be
used to efficiently measure the time spent in a critical section.

The Profiling API is meant to collect samples and generate a report
at the end of the lifetime of the process, either by printing out the
results once the process terminates; or by saving the raw data in a
binary file that can be loaded at a later date.

This profiling API is meant to be as close as possible to a zero cost
abstraction:

 - probes are only allocated if profiling is enabled
 - all profiling API is a no-op if profiling isn't enabled
 - the C API is meant to be easily tied to a scope, through the
   use of auto-cleanup macros provided by GLib

This allows projects using the Endless SDK to keep the profiling probes
in place, instead of conditionally compile them in.

https://phabricator.endlessm.com/T18514

1 files changed, 11 insertions, 1 deletions

diff --git a/endless/eosinit.c b/endless/eosinit.c
index 19d6d9b..f5c6185 100644
--- a/endless/eosinit.c
+++ b/endless/eosinit.c
@@ -6,13 +6,14 @@
 
 #include "endless.h"
 #include "eosinit-private.h"
+#include "eosprofile-private.h"
 
 /* Constructors supported since GCC 2.7; I have this on GLib's authority. This
 should also work on Clang. */
 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
 
 #define _EOS_CONSTRUCTOR(func) static void __attribute__((constructor)) func (void);
-#define _EOS_DESTRUCTOR(func) static void __atrribute__((destructor)) func (void);
+#define _EOS_DESTRUCTOR(func) static void __attribute__((destructor)) func (void);
 
 #else
 
@@ -38,10 +39,19 @@ _eos_init (void)
       bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
       bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
 
+      eos_profile_state_init ();
+
       _eos_initialized = TRUE;
     }
 }
 
+_EOS_DESTRUCTOR(_eos_fini);
+static void
+_eos_fini (void)
+{
+  eos_profile_state_dump ();
+}
+
 /*
  * eos_is_inited:
  *