Don't use Win32 API on Cygwin

Cygwin is a Posix platform to the extent possible.  It should use the
Posix API except in special circumstances.

src/hb-atomic.hh

@@ -100,7 +100,7 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
 #define hb_atomic_ptr_impl_cmpexch(P,O,N)	_hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N))
 
 
-#elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__))
+#elif !defined(HB_NO_MT) && defined(_WIN32)
 
 #include <windows.h>
 

src/hb-blob.cc

@@ -481,7 +481,7 @@ hb_blob_t::try_make_writable (void)
 # include <fcntl.h>
 #endif
 
-#if defined(_WIN32) || defined(__CYGWIN__)
+#ifdef _WIN32
 # include <windows.h>
 #else
 # ifndef O_BINARY
@@ -497,19 +497,19 @@ struct hb_mapped_file_t
 {
   char *contents;
   unsigned long length;
-#if defined(_WIN32) || defined(__CYGWIN__)
+#ifdef _WIN32
   HANDLE mapping;
 #endif
 };
 
-#if (defined(HAVE_MMAP) || defined(_WIN32) || defined(__CYGWIN__)) && !defined(HB_NO_MMAP)
+#if (defined(HAVE_MMAP) || defined(_WIN32)) && !defined(HB_NO_MMAP)
 static void
 _hb_mapped_file_destroy (void *file_)
 {
   hb_mapped_file_t *file = (hb_mapped_file_t *) file_;
 #ifdef HAVE_MMAP
   munmap (file->contents, file->length);
-#elif defined(_WIN32) || defined(__CYGWIN__)
+#elif defined(_WIN32)
   UnmapViewOfFile (file->contents);
   CloseHandle (file->mapping);
 #else
@@ -560,7 +560,7 @@ fail:
 fail_without_close:
   free (file);
 
-#elif (defined(_WIN32) || defined(__CYGWIN__)) && !defined(HB_NO_MMAP)
+#elif defined(_WIN32) && !defined(HB_NO_MMAP)
   hb_mapped_file_t *file = (hb_mapped_file_t *) calloc (1, sizeof (hb_mapped_file_t));
   if (unlikely (!file)) return hb_blob_get_empty ();
 

src/hb-mutex.hh

@@ -48,7 +48,7 @@
 /* Defined externally, i.e. in config.h; must have typedef'ed hb_mutex_impl_t as well. */
 
 
-#elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__))
+#elif !defined(HB_NO_MT) && defined(_WIN32)
 
 #include <windows.h>
 typedef CRITICAL_SECTION hb_mutex_impl_t;

src/hb-ot-shape-complex-arabic-fallback.hh

@@ -202,7 +202,7 @@ struct arabic_fallback_plan_t
   OT::hb_ot_layout_lookup_accelerator_t accel_array[ARABIC_FALLBACK_MAX_LOOKUPS];
 };
 
-#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(HB_NO_WIN1256)
+#if defined(_WIN32) && !defined(HB_NO_WIN1256)
 #define HB_WITH_WIN1256
 #endif
 

src/hb.hh

@@ -246,7 +246,7 @@ struct _hb_alignof
 #endif
 
 
-#if defined(_WIN32) || defined(__CYGWIN__)
+#ifdef _WIN32
    /* We need Windows Vista for both Uniscribe backend and for
     * MemoryBarrier.  We don't support compiling on Windows XP,
     * though we run on it fine. */