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libsxmp/lib/mcache.c

89 lines
1.9 KiB
C

/*
* Secure Network Transport Layer Library implementation.
* This is a proprietary software. See COPYING for further details.
*
* (c) 2013-2014 Copyright Askele, inc. <http://askele.com>
* (c) 2013-2014 Copyright Askele Ingria, inc. <http://askele-ingria.com>
*/
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <tdata/usrtc.h>
#include <sntl/mcache.h>
static long __cmp_longs(const void *a, const void *b)
{
return (long)(*(unsigned long*)a - *(unsigned long*)b);
}
int sntl_mcache_init(sntl_mcache_t *mc, size_t esize, int flags)
{
int r = 0, i;
usrtc_t *tree;
void *pt;
struct _mpg *pg;
/* check it */
if((esize < _MCACHE_EMINSIZE) || (esize > _MCACHE_EMAXSIZE)) return EINVAL;
/* yep, nil it */
memset(mc, 0, sizeof(sntl_mcache_t));
mc->magic = _MCACHE_MAGIC; /* let it be */
if((r = pthread_rwlock_init(&(mc->lock), NULL))) return -r;
/* init trees */
for(i = 0; i < 3; i ++) {
switch(i) {
case 0: tree = &(mc->pg_tree); break;
case 1: tree = &(mc->allocated); break;
case 2: tree = &(mc->used); break;
}
usrtc_init(tree, USRTC_REDBLACK, 129038, __cmp_longs);
}
/* deal with flags */
mc->flags = flags;
/* sizes */
mc->esize = esize + sizeof(unsigned long);
mc->epc = (_MPG_SIZE - sizeof(struct _mpg)) / mc->esize;
if((flags & _MCACHE_PREALLOC)) {
pt = mmap(NULL, _MPG_SIZE, PROT_READ|PROT_WRITE, MAP_ANONYMOUS, -1, 0);
if(pt == MAP_FAILED) {
pthread_rwlock_destroy(&(mc->lock));
return ENOMEM;
} else pg = (struct _mpg *)pt;
}
return r;
}
void* sntl_mcache_alloc(sntl_mcache_t *mc)
{
return NULL;
}
void sntl_mcache_free(void *p)
{
return;
}
void sntl_mcache_destroy(sntl_mcache_t *mc)
{
return;
}