From 9367bb5108e35134c9e5b570606bb76a7e4772c0 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Thu, 21 Apr 2022 07:38:51 +0200
Subject: Avoid code duplication using os_create_anonymous_file() from
 libdecor.

---
 src/CMakeLists.txt                                 |  2 +-
 src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx | 18 ++++--------------
 2 files changed, 5 insertions(+), 15 deletions(-)

(limited to 'src')

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);
-- 
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