51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/*_ handle.h Thu May 4 1989 Modified by: Walter Bright */
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#ifndef __HANDLE_H
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#define __HANDLE_H 1
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#if __cplusplus
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extern "C" {
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#endif
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/* Values above this are handles, below this are far pointers */
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#define HANDLE_BASE 0xFE000000
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/* Maximum number of handles possible */
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#define HANDLE_MAX ((int)(0x10000 - (HANDLE_BASE >> 16)))
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/* Size of pages (for EMM implementations, must match EMM_PAGESIZE) */
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#define HANDLE_PAGESIZE (16*1024)
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/*********************************
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* Determine if handle is a real handle or a far pointer.
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* Returns:
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* !=0 if handle
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* 0 if far pointer
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*/
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int handle_ishandle(void __handle *h);
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#define handle_ishandle(h) ((int)(((unsigned long) (h) >= HANDLE_BASE) != 0))
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void __handle * cdecl handle_malloc(unsigned);
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void __handle * cdecl handle_calloc(unsigned);
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void __handle * cdecl handle_realloc(void __handle *,unsigned);
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char __handle * cdecl handle_strdup(char __handle *);
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void cdecl handle_free(void __handle *);
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/* Enable these to lock out using handle memory */
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#if NO_HANDLE
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#define handle
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#define handle_malloc(n) malloc(n)
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#define handle_calloc(n) calloc((n),1)
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#define handle_realloc(h,n) realloc((h),(n))
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#define handle_free(h) free(h)
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#define handle_strdup(h) strdup(h)
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#endif
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#if __cplusplus
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}
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#endif
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#endif /* __HANDLE_H */
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