XCache is a fast, stable PHP opcode cacher that has been proven and is now running on production servers under high load. https://xcache.lighttpd.net/
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#ifdef TEST
# ifdef HAVE_CONFIG_H
# include <config.h>
# endif
# include <limits.h>
# include <stdio.h>
#else
# include "xcache.h"
#endif
#include "xc_shm.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
struct _xc_shm_scheme_t {
const char *name;
const xc_shm_vtable_t *vtable;
};
static xc_shm_scheme_t xc_shm_schemes[10];
void xc_shm_init_modules() /* {{{ */
{
extern void xc_allocator_init();
#ifdef HAVE_XCACHE_TEST
extern void xc_shm_malloc_register();
#endif
extern void xc_shm_mmap_register();
memset(xc_shm_schemes, 0, sizeof(xc_shm_schemes));
xc_allocator_init();
#ifdef HAVE_XCACHE_TEST
xc_shm_malloc_register();
#endif
xc_shm_mmap_register();
}
/* }}} */
int xc_shm_scheme_register(const char *name, const xc_shm_vtable_t *vtable) /* {{{ */
{
int i;
for (i = 0; i < 10; i ++) {
if (!xc_shm_schemes[i].name) {
xc_shm_schemes[i].name = name;
xc_shm_schemes[i].vtable = vtable;
return 1;
}
}
return 0;
}
/* }}} */
const xc_shm_vtable_t *xc_shm_scheme_find(const char *name) /* {{{ */
{
int i;
for (i = 0; i < 10 && xc_shm_schemes[i].name; i ++) {
if (strcmp(xc_shm_schemes[i].name, name) == 0) {
return xc_shm_schemes[i].vtable;
}
}
return NULL;
}
/* }}} */
xc_shm_scheme_t *xc_shm_scheme_first() /* {{{ */
{
return xc_shm_schemes;
}
/* }}} */
xc_shm_scheme_t *xc_shm_scheme_next(xc_shm_scheme_t *scheme) /* {{{ */
{
scheme ++;
return scheme->name ? scheme : NULL;
}
/* }}} */
const char *xc_shm_scheme_name(xc_shm_scheme_t *scheme) /* {{{ */
{
assert(scheme);
return scheme->name;
}
/* }}} */
xc_shm_t *xc_shm_init(const char *type, xc_shmsize_t size, int readonly_protection, const void *arg1, const void *arg2) /* {{{ */
{
const xc_shm_vtable_t *vtable = xc_shm_scheme_find(type);
if (vtable) {
xc_shm_t *shm = vtable->init(size, readonly_protection, arg1, arg2);
if (shm) {
shm->vtable = vtable;
}
return shm;
}
return NULL;
}
/* }}} */
void xc_shm_destroy(xc_shm_t *shm) /* {{{ */
{
shm->vtable->destroy(shm);
}
/* }}} */
int xc_shm_can_readonly(const xc_shm_t *shm) /* {{{ */
{
return ((xc_shm_base_t *)shm)->readonlydiff != 0;
}
/* }}} */
void *xc_shm_to_readwrite(const xc_shm_t *shm_, void *p) /* {{{ */
{
const xc_shm_base_t *shm = (const xc_shm_base_t *) shm_;
if (shm->readonlydiff) {
assert(shm->vtable->is_readonly(shm_, p));
p = ((char *) p) - shm->readonlydiff;
}
assert(shm->vtable->is_readwrite(shm_, p));
return p;
}
/* }}} */
void *xc_shm_to_readonly(const xc_shm_t *shm_, void *p) /* {{{ */
{
const xc_shm_base_t *shm = (const xc_shm_base_t *) shm_;
assert(shm->vtable->is_readwrite(shm_, p));
if (shm->readonlydiff) {
p = ((char *) p) + shm->readonlydiff;
assert(shm->vtable->is_readonly(shm_, p));
}
return p;
}
/* }}} */