Replaces clock_gettime() with ast_tsnow()

clock_gettime() is, unfortunately, not portable. But I did like that
over our usual `ts.tv_nsec = tv.tv_usec * 1000` copy/paste code we
usually do when we want a timespec and all we have is ast_tvnow().

This patch adds ast_tsnow(), which mimics ast_tvnow(), but returns a
timespec. If clock_gettime() is available, it will use that. Otherwise
ast_tsnow() falls back to using ast_tvnow().

Change-Id: Ibb1ee67ccf4826b9b76d5a5eb62e90b29b6c456e

1 files changed, 127 insertions, 5 deletions

diff --git a/configure b/configure
index 731b2f7a9..a64e0102d 100755
--- a/configure
+++ b/configure
@@ -756,6 +756,10 @@ PBX_SUPPSERV
 SUPPSERV_DIR
 SUPPSERV_INCLUDE
 SUPPSERV_LIB
+PBX_RT
+RT_DIR
+RT_INCLUDE
+RT_LIB
 PBX_OPENSSL
 OPENSSL_DIR
 OPENSSL_INCLUDE
@@ -11270,6 +11274,18 @@ fi
 
 
 
+RT_DESCRIP="Realtime functions"
+
+RT_DIR=${rt_DIR}
+
+PBX_RT=0
+
+
+
+
+
+
+
     SUPPSERV_DESCRIP="mISDN Supplemental Services"
     SUPPSERV_OPTION="suppserv"
     PBX_SUPPSERV=0
@@ -12962,6 +12978,112 @@ if test "x$JANSSON_LIB" == "x"; then
   as_fn_error $? "*** JSON support not found (this typically means the libjansson development package is missing)" "$LINENO" 5
 fi
 
+# See if clock_gettime is in librt
+
+if test "x${PBX_RT}" != "x1" -a "${USE_RT}" != "no"; then
+   pbxlibdir=""
+   # if --with-RT=DIR has been specified, use it.
+   if test "x${RT_DIR}" != "x"; then
+      if test -d ${RT_DIR}/lib; then
+         pbxlibdir="-L${RT_DIR}/lib"
+      else
+         pbxlibdir="-L${RT_DIR}"
+      fi
+   fi
+   pbxfuncname="clock_gettime"
+   if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
+      AST_RT_FOUND=yes
+   else
+      ast_ext_lib_check_save_CFLAGS="${CFLAGS}"
+      CFLAGS="${CFLAGS} "
+      as_ac_Lib=`$as_echo "ac_cv_lib_rt_${pbxfuncname}" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${pbxfuncname} in -lrt" >&5
+$as_echo_n "checking for ${pbxfuncname} in -lrt... " >&6; }
+if eval \${$as_ac_Lib+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lrt ${pbxlibdir}  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char ${pbxfuncname} ();
+int
+main ()
+{
+return ${pbxfuncname} ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$as_ac_Lib=yes"
+else
+  eval "$as_ac_Lib=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+eval ac_res=\$$as_ac_Lib
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"; then :
+  AST_RT_FOUND=yes
+else
+  AST_RT_FOUND=no
+fi
+
+      CFLAGS="${ast_ext_lib_check_save_CFLAGS}"
+   fi
+
+   # now check for the header.
+   if test "${AST_RT_FOUND}" = "yes"; then
+      RT_LIB="${pbxlibdir} -lrt "
+      # if --with-RT=DIR has been specified, use it.
+      if test "x${RT_DIR}" != "x"; then
+         RT_INCLUDE="-I${RT_DIR}/include"
+      fi
+      RT_INCLUDE="${RT_INCLUDE} "
+      if test "x" = "x" ; then	# no header, assume found
+         RT_HEADER_FOUND="1"
+      else				# check for the header
+         ast_ext_lib_check_saved_CPPFLAGS="${CPPFLAGS}"
+         CPPFLAGS="${CPPFLAGS} ${RT_INCLUDE}"
+         ac_fn_c_check_header_mongrel "$LINENO" "" "ac_cv_header_" "$ac_includes_default"
+if test "x$ac_cv_header_" = xyes; then :
+  RT_HEADER_FOUND=1
+else
+  RT_HEADER_FOUND=0
+fi
+
+
+         CPPFLAGS="${ast_ext_lib_check_saved_CPPFLAGS}"
+      fi
+      if test "x${RT_HEADER_FOUND}" = "x0" ; then
+         RT_LIB=""
+         RT_INCLUDE=""
+      else
+         if test "x${pbxfuncname}" = "x" ; then		# only checking headers -> no library
+            RT_LIB=""
+         fi
+         PBX_RT=1
+         cat >>confdefs.h <<_ACEOF
+#define HAVE_RT 1
+_ACEOF
+
+      fi
+   fi
+fi
+
+
+
 
 		if test "x${PBX_LIBXML2}" != "x1" -a "${USE_LIBXML2}" != "no"; then
 		PBX_LIBXML2=0
@@ -13515,7 +13637,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13561,7 +13683,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13585,7 +13707,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13630,7 +13752,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -13654,7 +13776,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];