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30 lines
837 B
C
30 lines
837 B
C
16 years ago
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#ifndef IARRAY_H
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#define IARRAY_H
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#include "uint64.h"
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#include <stddef.h>
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#include <pthread.h>
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/* this is an indirect array; it only reallocs the indirect index, not
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* the whole array. The actual data does not move. So there is no need
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* to lock the array for read accesses. */
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typedef struct {
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char** pages;
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size_t elemsize,pagefence,elemperpage,bytesperpage;
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/* pagefence is the number of pages + 1,
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* i.e. the first out of bounds index in "pages" */
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pthread_mutex_t m;
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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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/* 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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