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-rw-r--r--xcache/xc_shm.h54
1 files changed, 27 insertions, 27 deletions
diff --git a/xcache/xc_shm.h b/xcache/xc_shm.h
index 07cc59f..f253669 100644
--- a/xcache/xc_shm.h
+++ b/xcache/xc_shm.h
@@ -2,25 +2,26 @@
#define XC_SHM_H
#include <stdlib.h>
+#include <stddef.h>
+#include <assert.h>
-typedef struct _xc_shm_handlers_t xc_shm_handlers_t;
-
-#ifndef XC_SHM_IMPL
-struct _xc_shm_t {
- const xc_shm_handlers_t *handlers;
-};
-#define XC_SHM_IMPL _xc_shm_t
+#ifndef XC_SHM_T_DEFINED
+typedef struct _xc_shm_base_t xc_shm_t;
+#define XC_SHM_T_DEFINED
#endif
-typedef struct XC_SHM_IMPL xc_shm_t;
+typedef struct _xc_shm_vtable_t xc_shm_vtable_t;
+
+typedef struct _xc_shm_base_t {
+ const xc_shm_vtable_t *vtable;
+ ptrdiff_t readonlydiff;
+} xc_shm_base_t;
+
typedef size_t xc_shmsize_t;
/* shm */
-#define XC_SHM_CAN_READONLY(func) int func(xc_shm_t *shm)
-#define XC_SHM_IS_READWRITE(func) int func(xc_shm_t *shm, const void *p)
-#define XC_SHM_IS_READONLY(func) int func(xc_shm_t *shm, const void *p)
-#define XC_SHM_TO_READWRITE(func) void *func(xc_shm_t *shm, void *p)
-#define XC_SHM_TO_READONLY(func) void *func(xc_shm_t *shm, void *p)
+#define XC_SHM_IS_READWRITE(func) int func(const xc_shm_t *shm, const void *p)
+#define XC_SHM_IS_READONLY(func) int func(const xc_shm_t *shm, const void *p)
#define XC_SHM_INIT(func) xc_shm_t *func(xc_shmsize_t size, int readonly_protection, const void *arg1, const void *arg2)
#define XC_SHM_DESTROY(func) void func(xc_shm_t *shm)
@@ -28,28 +29,22 @@ typedef size_t xc_shmsize_t;
#define XC_SHM_MEMINIT(func) void *func(xc_shm_t *shm, xc_shmsize_t size)
#define XC_SHM_MEMDESTROY(func) void func(void *mem)
-#define XC_SHM_HANDLERS(name) { \
- xc_##name##_can_readonly \
+#define XC_SHM_VTABLE(name) { \
+ xc_##name##_init \
+ , xc_##name##_destroy \
, xc_##name##_is_readwrite \
, xc_##name##_is_readonly \
- , xc_##name##_to_readwrite \
- , xc_##name##_to_readonly \
\
- , xc_##name##_init \
- , xc_##name##_destroy \
\
, xc_##name##_meminit \
, xc_##name##_memdestroy \
}
-struct _xc_shm_handlers_t {
- XC_SHM_CAN_READONLY((*can_readonly));
- XC_SHM_IS_READWRITE((*is_readwrite));
- XC_SHM_IS_READONLY((*is_readonly));
- XC_SHM_TO_READWRITE((*to_readwrite));
- XC_SHM_TO_READONLY((*to_readonly));
+struct _xc_shm_vtable_t {
XC_SHM_INIT((*init));
XC_SHM_DESTROY((*destroy));
+ XC_SHM_IS_READWRITE((*is_readwrite));
+ XC_SHM_IS_READONLY((*is_readonly));
XC_SHM_MEMINIT((*meminit));
XC_SHM_MEMDESTROY((*memdestroy));
@@ -58,12 +53,17 @@ struct _xc_shm_handlers_t {
typedef struct _xc_shm_scheme_t xc_shm_scheme_t;
void xc_shm_init_modules();
-int xc_shm_scheme_register(const char *name, const xc_shm_handlers_t *handlers);
-const xc_shm_handlers_t *xc_shm_scheme_find(const char *name);
+int xc_shm_scheme_register(const char *name, const xc_shm_vtable_t *vtable);
+const xc_shm_vtable_t *xc_shm_scheme_find(const char *name);
xc_shm_scheme_t *xc_shm_scheme_first();
xc_shm_scheme_t *xc_shm_scheme_next(xc_shm_scheme_t *scheme);
const char *xc_shm_scheme_name(xc_shm_scheme_t *scheme);
xc_shm_t *xc_shm_init(const char *type, xc_shmsize_t size, int readonly_protection, const void *arg1, const void *arg2);
void xc_shm_destroy(xc_shm_t *shm);
+
+int xc_shm_can_readonly(const xc_shm_t *shm);
+void *xc_shm_to_readwrite(const xc_shm_t *shm_, void *p);
+void *xc_shm_to_readonly(const xc_shm_t *shm_, void *p);
+
#endif