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41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
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#ifndef IARRAY_H
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#define IARRAY_H
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/* This header defines an indirect array for use with the io_* routines.
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* Assumptions:
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* - the elements are small (many fit on one page),
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* - the platform has an atomic compare-and-swap instruction
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* - the compiler supports it via __sync_val_compare_and_swap
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*/
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#include "uint64.h"
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#include <stddef.h>
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#ifdef __MINGW32__
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#include <windows.h>
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#else
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#include <pthread.h>
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#endif
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typedef struct _iarray_page {
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struct _iarray_page* next;
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char data[];
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} iarray_page;
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typedef struct {
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iarray_page* pages[16];
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size_t elemsize,elemperpage,bytesperpage,len;
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} iarray;
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void iarray_init(iarray* ia,size_t elemsize);
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void* iarray_get(iarray* ia,size_t pos);
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void* iarray_allocate(iarray* ia,size_t pos);
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size_t iarray_length(iarray* ia);
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/* WARNING: do not use the array during or after iarray_free, make sure
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* no threads are potentially doing anything with the iarray while it is
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* being freed! */
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void iarray_free(iarray* ia);
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#endif
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