Avoid code duplication using os_create_anonymous_file() from libdecor.

2 files changed, 5 insertions, 15 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 01264e0a4..75f72a6d3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -468,7 +468,7 @@ if (OPTION_USE_WAYLAND)
     set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DUSE_SYSTEM_LIBDECOR")
   else()
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -I${CMAKE_CURRENT_SOURCE_DIR}/../libdecor/src   -DLIBDECOR_PLUGIN_API_VERSION=1 -DLIBDECOR_PLUGIN_DIR=\\\"/usr/local/lib\\\" ")
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSE_SYSTEM_LIBDECOR=0")
+    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSE_SYSTEM_LIBDECOR=0 -DHAVE_MEMFD_CREATE -DHAVE_MKOSTEMP -DHAVE_POSIX_FALLOCATE")
   endif (OPTION_USE_SYSTEM_LIBDECOR)
 
   if (GTK_FOUND)
diff --git a/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx
index c593a207b..79044c522 100644
--- a/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx
@@ -32,23 +32,13 @@
 
 extern unsigned fl_cmap[256]; // defined in fl_color.cxx
 
+extern "C" {
+  int os_create_anonymous_file(off_t);
+}
 
 static int create_anonymous_file(int size, char **pshared)
 {
-  int ret;
-  int fd = memfd_create("FLTK-for-Wayland", MFD_CLOEXEC | MFD_ALLOW_SEALING);
-  if (fd < 0) {
-    Fl::fatal("memfd_create failed: %s\n", strerror(errno));
-  }
-  fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK);
-  do {
-    ret = posix_fallocate(fd, 0, size);
-  } while (ret == EINTR);
-  if (ret != 0) {
-    close(fd);
-    errno = ret;
-    Fl::fatal("creating anonymous file of size %d failed: %s\n", size, strerror(errno));
-  }
+  int fd = os_create_anonymous_file(size);
   *pshared = (char*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
   if (*pshared == MAP_FAILED) {
     close(fd);