1.0.11.27: Oops-fix -- committed intermediate code to 1.0.11.26

[sbcl.git] / src / runtime / wrap.h

diff --git a/src/runtime/wrap.h b/src/runtime/wrap.h
index 0408971..6cf9f64 100644 (file)
--- a/src/runtime/wrap.h
+++ b/src/runtime/wrap.h
@@ -1,8 +1,8 @@
 /*
  * Data structures used in wrap.c in this directory, moved here from
  * wrap.c in November 2007 so that
- * src/tools-for-build/grovel-headers.c can grovel the sizes and
- * offsets of things.
+ * src/tools-for-build/grovel-headers.c can grovel the sizes of
+ * things.
  */
 
 
@@ -18,34 +18,54 @@
  * -- CSR, 2003-10-03
  *
  * Some motivated spark fixed MIPS. -- ths, 2005-10-06 */
+
 /* It would seem as though the FFI would have to be able to handle
  * 64-bit values in order for the LARGEFILE && !MIPS case below to
  * work, so can the comment above still be right? If FFI can only
  * handle 64-bit aliens on some platforms, maybe there should be a
  * distinct Lisp feature for 64-bit aliens support? -- RMK,
- * 2007-11-14 */
+ * 2007-11-14
+ *
+ * In any case, since the types defined here exist to give sizes to
+ * potentially munged or faked data in our stat wrapper, these
+ * shouldn't be used for any purpose for which the real type can be
+ * employed. */
 
 #include "sbcl.h"
 #include "runtime.h"
 
-#if defined(LISP_FEATURE_LARGEFILE) && !defined(LISP_FEATURE_MIPS)
-typedef dev_t ffi_dev_t;
-typedef off_t ffi_off_t;
-#elif defined(LISP_FEATURE_MIPS)
-typedef unsigned long ffi_dev_t; /* Linux/MIPS struct stat doesn't use dev_t */
-typedef off_t ffi_off_t;
-#elif defined(LISP_FEATURE_DARWIN)
-typedef dev_t ffi_dev_t;
-typedef off_t ffi_off_t;
+/* We use an extra layer of aliasing because Linux/MIPS struct stat
+   doesn't use dev_t. This type is not defined on the Lisp side. */
+#ifdef LISP_FEATURE_MIPS
+typedef unsigned long aliased_dev_t;
+#else
+typedef dev_t aliased_dev_t;
+#endif
+
+#if defined(LISP_FEATURE_LARGEFILE) || defined(LISP_FEATURE_DARWIN)
+typedef aliased_dev_t wst_dev_t;
+typedef off_t wst_off_t;
 #else
-typedef u32 ffi_dev_t; /* since Linux dev_t can be 64 bits */
-typedef u32 ffi_off_t; /* since OpenBSD 2.8 st_size is 64 bits */
+typedef u32 wst_dev_t; /* since Linux dev_t can be 64 bits */
+typedef u32 wst_off_t; /* since OpenBSD 2.8 st_size is 64 bits */
 #endif
 
 #ifdef LISP_FEATURE_OS_PROVIDES_BLKSIZE_T
-typedef blksize_t ffi_blksize_t;
+typedef blksize_t wst_blksize_t;
+typedef blkcnt_t wst_blkcnt_t;
 #else
-typedef unsigned long ffi_blksize_t;
+typedef unsigned long wst_blksize_t;
+typedef unsigned long wst_blkcnt_t;
+#endif
+
+#ifdef LISP_FEATURE_WIN32 /* Win32 lacks nlink_t, st_uid, st_gid.*/
+typedef short wst_nlink_t;
+typedef short wst_uid_t;
+typedef short wst_gid_t;
+#else
+typedef nlink_t wst_nlink_t;
+typedef uid_t wst_uid_t;
+typedef gid_t wst_gid_t;
 #endif
 
 /* a representation of stat(2) results which doesn't depend on CPU or OS */
@@ -60,22 +80,16 @@ struct stat_wrapper {
      * happen, and I nodded sagely. But now I know better.:-| This is
      * another entry for Dan Barlow's ongoing episodic rant about C
      * header files, I guess.. -- WHN 2001-05-10 */
-    ffi_dev_t     wrapped_st_dev;         /* device */
+    wst_dev_t     wrapped_st_dev;         /* device */
     ino_t         wrapped_st_ino;         /* inode */
     mode_t        wrapped_st_mode;        /* protection */
-#ifndef LISP_FEATURE_WIN32
-    nlink_t       wrapped_st_nlink;       /* number of hard links */
-    uid_t         wrapped_st_uid;         /* user ID of owner */
-    gid_t         wrapped_st_gid;         /* group ID of owner */
-#else
-    short         wrapped_st_nlink;       /* Win32 doesn't have nlink_t */
-    short         wrapped_st_uid;         /* Win32 doesn't have st_uid */
-    short         wrapped_st_gid;         /* Win32 doesn't have st_gid */
-#endif
-    ffi_dev_t     wrapped_st_rdev;        /* device type (if inode device) */
-    ffi_off_t     wrapped_st_size;        /* total size, in bytes */
-    ffi_blksize_t wrapped_st_blksize;     /* blocksize for filesystem I/O */
-    unsigned long wrapped_st_blocks;      /* number of blocks allocated */
+    wst_nlink_t   wrapped_st_nlink;       /* number of hard links */
+    wst_uid_t     wrapped_st_uid;         /* user ID of owner */
+    wst_gid_t     wrapped_st_gid;         /* group ID of owner */
+    wst_dev_t     wrapped_st_rdev;        /* device type (if inode device) */
+    wst_off_t     wrapped_st_size;        /* total size, in bytes */
+    wst_blksize_t wrapped_st_blksize;     /* blocksize for filesystem I/O */
+    wst_blkcnt_t  wrapped_st_blocks;      /* number of blocks allocated */
     time_t        wrapped_st_atime;       /* time_t of last access */
     time_t        wrapped_st_mtime;       /* time_t of last modification */
     time_t        wrapped_st_ctime;       /* time_t of last change */