From 9691aa202cf82c88808721ad0816d4514944c779 Mon Sep 17 00:00:00 2001
From: "Mika T. Lindqvist" <postmaster@raasu.org>
Date: Mon, 30 Sep 2024 18:13:32 +0000
Subject: Initial support for Haiku.


diff --git a/CMakeLists.txt b/CMakeLists.txt
index f1103c5..2271309 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -506,6 +506,8 @@ elseif(CMAKE_SYSTEM_NAME MATCHES "DragonFly")
   add_definitions(-DOS_DRAGONFLYBSD)
 elseif(CMAKE_SYSTEM_NAME MATCHES "Android")
   add_definitions(-DOS_ANDROID)
+elseif(CMAKE_SYSTEM_NAME MATCHES "Haiku")
+  add_definitions(-DOS_HAIKU)
 elseif(CMAKE_SYSTEM_NAME MATCHES "Windows")
   add_definitions(-DWIN32 -DOS_WIN -D_MBCS -DWIN64 -DNOMINMAX)
   if(MINGW)
diff --git a/env/fs_posix.cc b/env/fs_posix.cc
index 82fb9fb..4c83c95 100644
--- a/env/fs_posix.cc
+++ b/env/fs_posix.cc
@@ -585,8 +585,15 @@ class PosixFileSystem : public FileSystem {
     while ((entry = readdir(d)) != nullptr) {
       // filter out '.' and '..' directory entries
       // which appear only on some platforms
+#if OS_HAIKU
+      struct stat entry_stat;
+      stat(entry->d_name, &entry_stat);
+      bool is_directory = S_ISDIR(entry_stat.st_mode);
+#else
+      bool is_directory = entry->d_type = DT_DIR;
+#endif
       const bool ignore =
-          entry->d_type == DT_DIR &&
+          is_directory &&
           (strcmp(entry->d_name, ".") == 0 ||
            strcmp(entry->d_name, "..") == 0
 #ifndef ASSERT_STATUS_CHECKED
@@ -727,8 +734,12 @@ class PosixFileSystem : public FileSystem {
       return IOError("stat file", second, errno);
     }
 
+#if OS_HAIKU
+    if (statbuf[0].st_dev != statbuf[1].st_dev ||
+#else
     if (major(statbuf[0].st_dev) != major(statbuf[1].st_dev) ||
         minor(statbuf[0].st_dev) != minor(statbuf[1].st_dev) ||
+#endif
         statbuf[0].st_ino != statbuf[1].st_ino) {
       *res = false;
     } else {
diff --git a/env/io_posix.cc b/env/io_posix.cc
index 231e88d..0159bca 100644
--- a/env/io_posix.cc
+++ b/env/io_posix.cc
@@ -1234,6 +1234,10 @@ IOStatus PosixMmapFile::Sync(const IOOptions& /*opts*/,
   if (::fcntl(fd_, F_FULLFSYNC) < 0) {
     return IOError("while fcntl(F_FULLSYNC) mmapped file", filename_, errno);
   }
+#elif OS_HAIKU
+  if (fsync(fd_) < 0) {
+    return IOError("While fsync mmapped file", filename_, errno);
+  }
 #else   // HAVE_FULLFSYNC
   if (fdatasync(fd_) < 0) {
     return IOError("While fdatasync mmapped file", filename_, errno);
@@ -1453,6 +1457,10 @@ IOStatus PosixWritableFile::Sync(const IOOptions& /*opts*/,
   if (::fcntl(fd_, F_FULLFSYNC) < 0) {
     return IOError("while fcntl(F_FULLFSYNC)", filename_, errno);
   }
+#elif OS_HAIKU
+  if (fsync(fd_) < 0) {
+    return IOError("While fsync", filename_, errno);
+  }
 #else   // HAVE_FULLFSYNC
   if (fdatasync(fd_) < 0) {
     return IOError("While fdatasync", filename_, errno);
@@ -1650,6 +1658,10 @@ IOStatus PosixRandomRWFile::Sync(const IOOptions& /*opts*/,
   if (::fcntl(fd_, F_FULLFSYNC) < 0) {
     return IOError("while fcntl(F_FULLFSYNC) random rw file", filename_, errno);
   }
+#elif OS_HAIKU
+  if (fsync(fd_) < 0) {
+    return IOError("While fsync random read/write file", filename_, errno);
+  }
 #else   // HAVE_FULLFSYNC
   if (fdatasync(fd_) < 0) {
     return IOError("While fdatasync random read/write file", filename_, errno);
diff --git a/env/io_posix.h b/env/io_posix.h
index 60788df..e816021 100644
--- a/env/io_posix.h
+++ b/env/io_posix.h
@@ -30,7 +30,7 @@
 // For non linux platform, the following macros are used only as place
 // holder.
 #if !(defined OS_LINUX) && !(defined OS_FREEBSD) && !(defined CYGWIN) && \
-    !(defined OS_AIX) && !(defined OS_ANDROID)
+    !(defined OS_AIX) && !(defined OS_ANDROID) && !(defined OS_HAIKU)
 #define POSIX_FADV_NORMAL 0     /* [MC1] no further special treatment */
 #define POSIX_FADV_RANDOM 1     /* [MC1] expect random page refs */
 #define POSIX_FADV_SEQUENTIAL 2 /* [MC1] expect sequential page refs */
diff --git a/port/port_posix.h b/port/port_posix.h
index 386be53..a127525 100644
--- a/port/port_posix.h
+++ b/port/port_posix.h
@@ -21,7 +21,9 @@
 // in fact, we could use that one
 #define ROCKSDB_PRIszt "zu"
 
+#ifndef OS_HAIKU
 #define __declspec(S)
+#endif
 
 #undef PLATFORM_IS_LITTLE_ENDIAN
 #if defined(OS_MACOSX)
-- 
2.45.2