45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#ifndef KIMODEM_ARENA_H
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#define KIMODEM_ARENA_H
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#include <sys/stat.h>
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#include <cstddef>
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#include <cstdint>
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typedef struct {
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uint8_t *Store;
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size_t Size;
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int fd;
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uint8_t Type;
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} Arena;
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/*
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* InitializeArena is intended for use only with systems that
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* do not initialize new variables to zero. It should be called
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* exactly once, at the start of the program. Any other time the
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* arena needs to be reset, it should be called with clear_arena
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* or destroy_arena.
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*/
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void InitializeArena(Arena &arena);
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int NewStaticArena(Arena &, uint8_t *, size_t);
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int AllocNewArena(Arena &, size_t);
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#if defined(__linux__)
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int MMapArena(Arena &, int); /* arena will own fd */
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int CreateArena(Arena &arena, const char *path, size_t size, mode_t mode);
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int OpenArena(Arena &, const char *, size_t);
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#endif
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void ClearArena(Arena &);
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int DestroyArena(Arena &); /* dispose of any memory used by arena */
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/* DANGER: if arena is file backed (mmap or open), DO NOT WRITE TO THE
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* BACKING FILE! */
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int WriteArena(const Arena &arena, const char *path);
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void DisplayArena(const Arena &arena);
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#endif
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