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for mmap objcodes, store the fd in the third word, as a scheme int

This leaves space for native code.

* libguile/objcodes.h (SCM_OBJCODE_NATIVE_CODE)
  (SCM_SET_OBJCODE_NATIVE_CODE): Reserve the fourth word of objcode for
  "native code", whatever that means.

* libguile/objcodes.c: Update a comment.
  (make_objcode_by_mmap): Put the fd in the third word.
This commit is contained in:
Andy Wingo 2011-01-27 13:11:02 +01:00
parent f9654187b1
commit 6ce3666ff2
2 changed files with 8 additions and 6 deletions

View file

@ -57,6 +57,9 @@ struct scm_objcode
#define SCM_OBJCODE_IS_SLICE(x) (SCM_OBJCODE_TYPE (x) == SCM_OBJCODE_TYPE_SLICE)
#define SCM_OBJCODE_IS_STATIC(x) (SCM_OBJCODE_TYPE (x) == SCM_OBJCODE_TYPE_STATIC)
#define SCM_OBJCODE_NATIVE_CODE(x) (SCM_CELL_WORD_3 (x))
#define SCM_SET_OBJCODE_NATIVE_CODE(x, code) (SCM_SET_CELL_WORD_3 (x, code))
SCM scm_c_make_objcode_slice (SCM parent, const scm_t_uint8 *ptr);
SCM_API SCM scm_load_objcode (SCM file);
SCM_API SCM scm_objcode_p (SCM obj);