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70 lines
2.0 KiB
70 lines
2.0 KiB
#ifndef XC_SHM_H
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#define XC_SHM_H
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#include <stdlib.h>
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#include <stddef.h>
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#include <assert.h>
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#ifndef XC_SHM_T_DEFINED
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typedef struct _xc_shm_base_t xc_shm_t;
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#define XC_SHM_T_DEFINED
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#endif
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typedef struct _xc_shm_vtable_t xc_shm_vtable_t;
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typedef struct _xc_shm_base_t {
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const xc_shm_vtable_t *vtable;
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ptrdiff_t readonlydiff;
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} xc_shm_base_t;
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typedef size_t xc_shmsize_t;
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/* shm */
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#define XC_SHM_IS_READWRITE(func) int func(const xc_shm_t *shm, const void *p)
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#define XC_SHM_IS_READONLY(func) int func(const xc_shm_t *shm, const void *p)
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#define XC_SHM_INIT(func) xc_shm_t *func(xc_shmsize_t size, int readonly_protection, const void *arg1, const void *arg2)
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#define XC_SHM_DESTROY(func) void func(xc_shm_t *shm)
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#define XC_SHM_MEMINIT(func) void *func(xc_shm_t *shm, xc_shmsize_t size)
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#define XC_SHM_MEMDESTROY(func) void func(void *mem)
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#define XC_SHM_VTABLE(name) { \
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xc_##name##_init \
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, xc_##name##_destroy \
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, xc_##name##_is_readwrite \
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, xc_##name##_is_readonly \
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\
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\
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, xc_##name##_meminit \
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, xc_##name##_memdestroy \
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}
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struct _xc_shm_vtable_t {
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XC_SHM_INIT((*init));
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XC_SHM_DESTROY((*destroy));
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XC_SHM_IS_READWRITE((*is_readwrite));
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XC_SHM_IS_READONLY((*is_readonly));
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XC_SHM_MEMINIT((*meminit));
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XC_SHM_MEMDESTROY((*memdestroy));
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};
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typedef struct _xc_shm_scheme_t xc_shm_scheme_t;
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void xc_shm_init_modules();
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int xc_shm_scheme_register(const char *name, const xc_shm_vtable_t *vtable);
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const xc_shm_vtable_t *xc_shm_scheme_find(const char *name);
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xc_shm_scheme_t *xc_shm_scheme_first();
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xc_shm_scheme_t *xc_shm_scheme_next(xc_shm_scheme_t *scheme);
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const char *xc_shm_scheme_name(xc_shm_scheme_t *scheme);
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xc_shm_t *xc_shm_init(const char *type, xc_shmsize_t size, int readonly_protection, const void *arg1, const void *arg2);
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void xc_shm_destroy(xc_shm_t *shm);
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int xc_shm_can_readonly(const xc_shm_t *shm);
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void *xc_shm_to_readwrite(const xc_shm_t *shm_, void *p);
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void *xc_shm_to_readonly(const xc_shm_t *shm_, void *p);
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#endif
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