From d899da951dd86d2b59ae02a308a2e2191503d31c Mon Sep 17 00:00:00 2001
From: alexpeshkoff <alexpeshkoff@users.sourceforge.net>
Date: Wed, 4 Feb 2009 11:36:53 +0000
Subject: [PATCH] Use when possible much better way to delay thread execution

---
 configure.in       |  1 +
 src/common/thd.cpp | 28 ++++++++++++++++++++++++++--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/configure.in b/configure.in
index 4779e0e82e..1976c484cc 100644
--- a/configure.in
+++ b/configure.in
@@ -593,6 +593,7 @@ if test "$ac_cv_func_gettimeofday" = "yes"; then
 #endif])
 fi
 AC_CHECK_FUNCS(time times)
+AC_CHECK_FUNCS(nanosleep)
 AC_SEARCH_LIBS(gethostname,nsl)
 AC_SEARCH_LIBS(connect,socket)
 AC_CHECK_FUNCS(strcasecmp stricmp)
diff --git a/src/common/thd.cpp b/src/common/thd.cpp
index 1e539e67f6..5722d85244 100644
--- a/src/common/thd.cpp
+++ b/src/common/thd.cpp
@@ -44,6 +44,16 @@
 #include <unistd.h>
 #endif
 
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
 
 #ifdef SOLARIS_MT
 #include <thread.h>
@@ -101,12 +111,26 @@ void THD_sleep(ULONG milliseconds)
  *	of milliseconds.
  *
  **************************************/
-#ifdef WIN_NT
+#if defined(WIN_NT)
 	SleepEx(milliseconds, FALSE);
+#elif defined(HAVE_NANOSLEEP)
+	timespec timer, rem;
+	timer.tv_sec = milliseconds / 1000;
+	timer.tv_nsec = (milliseconds % 1000) * 1000000;
+
+	while (nanosleep(&timer, &rem) != 0)
+	{
+		if (errno != EINTR)
+		{
+			timer = rem;
+			continue;
+		}
+		Firebird::system_call_failed::raise("nanosleep");
+	}
 #else
 	Firebird::Semaphore timer;
 	timer.tryEnter(0, milliseconds);
-#endif // WIN_NT
+#endif
 }