[Mesa-dev] [PATCH v3] threads, configure.ac, meson.build: define and use HAVE_TIMESPEC_GET

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haehnle at amd.com>

Tested with Travis and Appveyor.

v2: add HAVE_TIMESPEC_GET for non-Windows Scons builds
v3: use check_functions in Scons (Eric)

Cc: Rob Herring <robh at kernel.org>
Cc: Alexander von Gluck IV <kallisti5 at unixzen.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103674
Fixes: f1a364878431 ("threads: update for late C11 changes")
Reviewed-by: Eric Engestrom <eric.engestrom at imgtec.com> (v2)
Reviewed-by: Dylan Baker <dylan at pnwbakers.com> (v2)
Reviewed-by: Jon Turney <jon.turney at dronecode.org.uk> (v2)
---
 configure.ac                | 1 +
 include/c11/threads_posix.h | 2 +-
 meson.build                 | 2 +-
 scons/gallium.py            | 3 +++
 4 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 411c4f6b3e0..a7ae920ab9c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -841,20 +841,21 @@ if test "x$enable_asm" = xyes; then
         AC_MSG_RESULT([no, platform not supported])
         ;;
     esac
 fi
 
 AC_HEADER_MAJOR
 AC_CHECK_HEADER([xlocale.h], [DEFINES="$DEFINES -DHAVE_XLOCALE_H"])
 AC_CHECK_HEADER([sys/sysctl.h], [DEFINES="$DEFINES -DHAVE_SYS_SYSCTL_H"])
 AC_CHECK_FUNC([strtof], [DEFINES="$DEFINES -DHAVE_STRTOF"])
 AC_CHECK_FUNC([mkostemp], [DEFINES="$DEFINES -DHAVE_MKOSTEMP"])
+AC_CHECK_FUNC([timespec_get], [DEFINES="$DEFINES -DHAVE_TIMESPEC_GET"])
 
 AC_MSG_CHECKING([whether strtod has locale support])
 AC_LINK_IFELSE([AC_LANG_SOURCE([[
     #define _GNU_SOURCE
     #include <stdlib.h>
     #include <locale.h>
     #ifdef HAVE_XLOCALE_H
     #include <xlocale.h>
     #endif
     int main() {
diff --git a/include/c11/threads_posix.h b/include/c11/threads_posix.h
index 7bf6a0f6ef6..45cb6075e6e 100644
--- a/include/c11/threads_posix.h
+++ b/include/c11/threads_posix.h
@@ -375,21 +375,21 @@ tss_get(tss_t key)
 // 7.25.6.4
 static inline int
 tss_set(tss_t key, void *val)
 {
     return (pthread_setspecific(key, val) == 0) ? thrd_success : thrd_error;
 }
 
 
 /*-------------------- 7.25.7 Time functions --------------------*/
 // 7.25.6.1
-#if 0
+#ifndef HAVE_TIMESPEC_GET
 static inline int
 timespec_get(struct timespec *ts, int base)
 {
     if (!ts) return 0;
     if (base == TIME_UTC) {
         clock_gettime(CLOCK_REALTIME, ts);
         return base;
     }
     return 0;
 }
diff --git a/meson.build b/meson.build
index 314d15ac461..25a5cd658d1 100644
--- a/meson.build
+++ b/meson.build
@@ -527,21 +527,21 @@ if cc.has_header_symbol('sys/sysmacros.h', 'major')
 elif cc.has_header_symbol('sys/mkdev.h', 'major')
   pre_args += '-DMAJOR_IN_MKDEV'
 endif
 
 foreach h : ['xlocale.h', 'sys/sysctl.h', 'linux/futex.h']
   if cc.has_header(h)
     pre_args += '-DHAVE_ at 0@'.format(h.to_upper().underscorify())
   endif
 endforeach
 
-foreach f : ['strtof', 'mkostemp', 'posix_memalign']
+foreach f : ['strtof', 'mkostemp', 'posix_memalign', 'timespec_get']
   if cc.has_function(f)
     pre_args += '-DHAVE_ at 0@'.format(f.to_upper())
   endif
 endforeach
 
 # strtod locale support
 if cc.links('''
     #define _GNU_SOURCE
     #include <stdlib.h>
     #include <locale.h>
diff --git a/scons/gallium.py b/scons/gallium.py
index 94022df1808..ef3b2ee81ae 100755
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -348,20 +348,23 @@ def generate(env):
                 'GLX_DIRECT_RENDERING',
                 'GLX_INDIRECT_RENDERING',
             ]
 
         if check_header(env, 'xlocale.h'):
             cppdefines += ['HAVE_XLOCALE_H']
 
         if check_functions(env, ['strtod_l', 'strtof_l']):
             cppdefines += ['HAVE_STRTOD_L']
 
+        if check_functions(env, ['timespec_get']):
+            cppdefines += ['HAVE_TIMESPEC_GET']
+
     if platform == 'windows':
         cppdefines += [
             'WIN32',
             '_WINDOWS',
             #'_UNICODE',
             #'UNICODE',
             # http://msdn.microsoft.com/en-us/library/aa383745.aspx
             ('_WIN32_WINNT', '0x0601'),
             ('WINVER', '0x0601'),
         ]
-- 
2.11.0