[glib] Added and Moved checks for includes

[Chun-wei Fan <fanchunwei src gnome org>]

commit 9806040455d6d482db3908f2d56ddfe455bae660
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Nov 9 09:53:12 2010 +0800

    Added and Moved checks for includes
    
    Moved checks for G_OS_WIN32 after GLib header includes and added other checks
    required for Windows/MSVC builds

 glib/gdatetime.c |   10 +++---
 glib/gmessages.c |   18 ++++++------
 glib/gscanner.c  |    8 +++---
 glib/gtimer.c    |   77 +++++++++++++++++++++++++++++++++++++++++++++++-------
 4 files changed, 85 insertions(+), 28 deletions(-)
---
diff --git a/glib/gdatetime.c b/glib/gdatetime.c
index 35ca791..5608a59 100644
--- a/glib/gdatetime.c
+++ b/glib/gdatetime.c
@@ -54,11 +54,6 @@
 #include <unistd.h>
 #endif
 
-#ifndef G_OS_WIN32
-#include <sys/time.h>
-#include <time.h>
-#endif /* !G_OS_WIN32 */
-
 #include "gdatetime.h"
 
 #include "gatomic.h"
@@ -73,6 +68,11 @@
 
 #include "glibintl.h"
 
+#ifndef G_OS_WIN32
+#include <sys/time.h>
+#include <time.h>
+#endif /* !G_OS_WIN32 */
+
 /**
  * SECTION:date-time
  * @title: GDateTime
diff --git a/glib/gmessages.c b/glib/gmessages.c
index f9592ba..245e454 100644
--- a/glib/gmessages.c
+++ b/glib/gmessages.c
@@ -41,15 +41,6 @@
 #include <locale.h>
 #include <errno.h>
 
-#ifdef G_OS_WIN32
-#include <process.h>		/* For getpid() */
-#include <io.h>
-#  define STRICT		/* Strict typing, please */
-#  define _WIN32_WINDOWS 0x0401 /* to get IsDebuggerPresent */
-#  include <windows.h>
-#  undef STRICT
-#endif
-
 #include "gmessages.h"
 
 #include "gbacktrace.h"
@@ -63,6 +54,15 @@
 #include "gstrfuncs.h"
 #include "gstring.h"
 
+#ifdef G_OS_WIN32
+#include <process.h>		/* For getpid() */
+#include <io.h>
+#  define STRICT		/* Strict typing, please */
+#  define _WIN32_WINDOWS 0x0401 /* to get IsDebuggerPresent */
+#  include <windows.h>
+#  undef STRICT
+#endif
+
 
 /* --- structures --- */
 typedef struct _GLogDomain	GLogDomain;
diff --git a/glib/gscanner.c b/glib/gscanner.c
index 1234a60..7dc2eb3 100644
--- a/glib/gscanner.c
+++ b/glib/gscanner.c
@@ -42,10 +42,6 @@
 #include <unistd.h>
 #endif
 
-#ifdef G_OS_WIN32
-#include <io.h> /* For _read() */
-#endif
-
 #include "gscanner.h"
 
 #include "gprintfint.h"
@@ -53,6 +49,10 @@
 #include "gstring.h"
 #include "gtestutils.h"
 
+#ifdef G_OS_WIN32
+#include <io.h> /* For _read() */
+#endif
+
 /* --- defines --- */
 #define	to_lower(c)				( \
 	(guchar) (							\
diff --git a/glib/gtimer.c b/glib/gtimer.c
index 92e3e3c..8716c6d 100644
--- a/glib/gtimer.c
+++ b/glib/gtimer.c
@@ -37,7 +37,9 @@
 #include <unistd.h>
 #endif /* HAVE_UNISTD_H */
 
+#ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
+#endif
 #include <time.h>
 #ifndef G_OS_WIN32
 #include <errno.h>
@@ -52,7 +54,7 @@
 #include "gmem.h"
 #include "gstrfuncs.h"
 #include "gtestutils.h"
-#include "gmain.h"
+#include "gthread.h"
 
 /**
  * SECTION: timers
@@ -63,8 +65,19 @@
  * that time. This is done somewhat differently on different platforms,
  * and can be tricky to get exactly right, so #GTimer provides a
  * portable/convenient interface.
+ *
+ * <note><para>
+ *  #GTimer uses a higher-quality clock when thread support is available.
+ *  Therefore, calling g_thread_init() while timers are running may lead to
+ *  unreliable results. It is best to call g_thread_init() before starting any
+ *  timers, if you are using threads at all.
+ * </para></note>
  **/
 
+#define G_NSEC_PER_SEC 1000000000
+
+#define GETTIME(v) (v = g_thread_gettime ())
+
 /**
  * GTimer:
  *
@@ -93,7 +106,7 @@ g_timer_new (void)
   timer = g_new (GTimer, 1);
   timer->active = TRUE;
 
-  timer->start = g_get_monotonic_time ();
+  GETTIME (timer->start);
 
   return timer;
 }
@@ -128,7 +141,7 @@ g_timer_start (GTimer *timer)
 
   timer->active = TRUE;
 
-  timer->start = g_get_monotonic_time ();
+  GETTIME (timer->start);
 }
 
 /**
@@ -145,7 +158,7 @@ g_timer_stop (GTimer *timer)
 
   timer->active = FALSE;
 
-  timer->end = g_get_monotonic_time ();
+  GETTIME (timer->end);
 }
 
 /**
@@ -161,7 +174,7 @@ g_timer_reset (GTimer *timer)
 {
   g_return_if_fail (timer != NULL);
 
-  timer->start = g_get_monotonic_time ();
+  GETTIME (timer->start);
 }
 
 /**
@@ -189,7 +202,7 @@ g_timer_continue (GTimer *timer)
 
   elapsed = timer->end - timer->start;
 
-  timer->start = g_get_monotonic_time ();
+  GETTIME (timer->start);
 
   timer->start -= elapsed;
 
@@ -219,7 +232,7 @@ g_timer_continue (GTimer *timer)
  **/
 gdouble
 g_timer_elapsed (GTimer *timer,
-                 gulong *microseconds)
+		 gulong *microseconds)
 {
   gdouble total;
   gint64 elapsed;
@@ -227,7 +240,7 @@ g_timer_elapsed (GTimer *timer,
   g_return_val_if_fail (timer != NULL, 0);
 
   if (timer->active)
-    timer->end = g_get_monotonic_time ();
+    GETTIME (timer->end);
 
   elapsed = timer->end - timer->start;
 
@@ -244,13 +257,57 @@ g_usleep (gulong microseconds)
 {
 #ifdef G_OS_WIN32
   Sleep (microseconds / 1000);
-#else
+#else /* !G_OS_WIN32 */
+# ifdef HAVE_NANOSLEEP
   struct timespec request, remaining;
   request.tv_sec = microseconds / G_USEC_PER_SEC;
   request.tv_nsec = 1000 * (microseconds % G_USEC_PER_SEC);
   while (nanosleep (&request, &remaining) == -1 && errno == EINTR)
     request = remaining;
-#endif
+# else /* !HAVE_NANOSLEEP */
+#  ifdef HAVE_NSLEEP
+  /* on AIX, nsleep is analogous to nanosleep */
+  struct timespec request, remaining;
+  request.tv_sec = microseconds / G_USEC_PER_SEC;
+  request.tv_nsec = 1000 * (microseconds % G_USEC_PER_SEC);
+  while (nsleep (&request, &remaining) == -1 && errno == EINTR)
+    request = remaining;
+#  else /* !HAVE_NSLEEP */
+  if (g_thread_supported ())
+    {
+      static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
+      static GCond* cond = NULL;
+      GTimeVal end_time;
+      
+      g_get_current_time (&end_time);
+      if (microseconds > G_MAXLONG)
+	{
+	  microseconds -= G_MAXLONG;
+	  g_time_val_add (&end_time, G_MAXLONG);
+	}
+      g_time_val_add (&end_time, microseconds);
+
+      g_static_mutex_lock (&mutex);
+      
+      if (!cond)
+	cond = g_cond_new ();
+      
+      while (g_cond_timed_wait (cond, g_static_mutex_get_mutex (&mutex), 
+				&end_time))
+	/* do nothing */;
+      
+      g_static_mutex_unlock (&mutex);
+    }
+  else
+    {
+      struct timeval tv;
+      tv.tv_sec = microseconds / G_USEC_PER_SEC;
+      tv.tv_usec = microseconds % G_USEC_PER_SEC;
+      select(0, NULL, NULL, NULL, &tv);
+    }
+#  endif /* !HAVE_NSLEEP */
+# endif /* !HAVE_NANOSLEEP */
+#endif /* !G_OS_WIN32 */
 }
 
 /**