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|
/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "mem_pool.h"
#include "fstring.h"
#include "logger.h"
#include "ottery.h"
#include "unix-std.h"
#include "khash.h"
#include "cryptobox.h"
#ifdef HAVE_SCHED_YIELD
#include <sched.h>
#endif
/* Sleep time for spin lock in nanoseconds */
#define MUTEX_SLEEP_TIME 10000000L
#define MUTEX_SPIN_COUNT 100
#define POOL_MTX_LOCK() do { } while (0)
#define POOL_MTX_UNLOCK() do { } while (0)
/*
* This define specify whether we should check all pools for free space for new object
* or just begin scan from current (recently attached) pool
* If MEMORY_GREEDY is defined, then we scan all pools to find free space (more CPU usage, slower
* but requires less memory). If it is not defined check only current pool and if object is too large
* to place in it allocate new one (this may cause huge CPU usage in some cases too, but generally faster than
* greedy method)
*/
#undef MEMORY_GREEDY
#define ENTRY_LEN 128
#define ENTRY_NELTS 64
struct entry_elt {
guint32 fragmentation;
guint32 leftover;
};
struct rspamd_mempool_entry_point {
gchar src[ENTRY_LEN];
guint32 cur_suggestion;
guint32 cur_elts;
struct entry_elt elts[ENTRY_NELTS];
};
static inline uint32_t
rspamd_entry_hash (const char *str)
{
return rspamd_cryptobox_fast_hash (str, strlen (str), rspamd_hash_seed ());
}
static inline int
rspamd_entry_equal (const char *k1, const char *k2)
{
return strcmp (k1, k2) == 0;
}
KHASH_INIT(mempool_entry, const gchar *, struct rspamd_mempool_entry_point *,
1, rspamd_entry_hash, rspamd_entry_equal)
static khash_t(mempool_entry) *mempool_entries = NULL;
/* Internal statistic */
static rspamd_mempool_stat_t *mem_pool_stat = NULL;
/* Environment variable */
static gboolean env_checked = FALSE;
static gboolean always_malloc = FALSE;
/**
* Function that return free space in pool page
* @param x pool page struct
*/
static gsize
pool_chain_free (struct _pool_chain *chain)
{
gint64 occupied = chain->pos - chain->begin + MEM_ALIGNMENT;
return (occupied < (gint64)chain->len ?
chain->len - occupied : 0);
}
/* By default allocate 8Kb chunks of memory */
#define FIXED_POOL_SIZE 4096
static inline struct rspamd_mempool_entry_point *
rspamd_mempool_entry_new (const gchar *loc)
{
struct rspamd_mempool_entry_point **pentry, *entry;
gint r;
khiter_t k;
k = kh_put (mempool_entry, mempool_entries, loc, &r);
if (r >= 0) {
pentry = &kh_value (mempool_entries, k);
entry = g_malloc0 (sizeof (*entry));
*pentry = entry;
memset (entry, 0, sizeof (*entry));
rspamd_strlcpy (entry->src, loc, sizeof (entry->src));
#ifdef HAVE_GETPAGESIZE
entry->cur_suggestion = MAX (getpagesize (), FIXED_POOL_SIZE);
#else
entry->cur_suggestion = MAX (sysconf (_SC_PAGESIZE), FIXED_POOL_SIZE);
#endif
}
else {
g_assert_not_reached ();
}
return entry;
}
static inline struct rspamd_mempool_entry_point *
rspamd_mempool_get_entry (const gchar *loc)
{
khiter_t k;
struct rspamd_mempool_entry_point *elt;
if (mempool_entries == NULL) {
mempool_entries = kh_init (mempool_entry);
}
else {
k = kh_get (mempool_entry, mempool_entries, loc);
if (k != kh_end (mempool_entries)) {
elt = kh_value (mempool_entries, k);
return elt;
}
}
return rspamd_mempool_entry_new (loc);
}
static struct _pool_chain *
rspamd_mempool_chain_new (gsize size, enum rspamd_mempool_chain_type pool_type)
{
struct _pool_chain *chain;
gpointer map;
g_return_val_if_fail (size > 0, NULL);
if (pool_type == RSPAMD_MEMPOOL_SHARED) {
#if defined(HAVE_MMAP_ANON)
map = mmap (NULL,
size + sizeof (struct _pool_chain),
PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED,
-1,
0);
if (map == MAP_FAILED) {
msg_err ("cannot allocate %z bytes of shared memory, aborting", size +
sizeof (struct _pool_chain));
abort ();
}
chain = map;
chain->begin = ((guint8 *) chain) + sizeof (struct _pool_chain);
#elif defined(HAVE_MMAP_ZERO)
gint fd;
fd = open ("/dev/zero", O_RDWR);
if (fd == -1) {
return NULL;
}
map = mmap (NULL,
size + sizeof (struct _pool_chain),
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd,
0);
if (map == MAP_FAILED) {
msg_err ("cannot allocate %z bytes, aborting", size +
sizeof (struct _pool_chain));
abort ();
}
chain = map;
chain->begin = ((guint8 *) chain) + sizeof (struct _pool_chain);
#else
#error No mmap methods are defined
#endif
g_atomic_int_inc (&mem_pool_stat->shared_chunks_allocated);
g_atomic_int_add (&mem_pool_stat->bytes_allocated, size);
}
else {
map = g_malloc (sizeof (struct _pool_chain) + size);
chain = map;
chain->begin = ((guint8 *) chain) + sizeof (struct _pool_chain);
g_atomic_int_add (&mem_pool_stat->bytes_allocated, size);
g_atomic_int_inc (&mem_pool_stat->chunks_allocated);
}
chain->pos = align_ptr (chain->begin, MEM_ALIGNMENT);
chain->len = size;
chain->lock = NULL;
return chain;
}
static void
rspamd_mempool_create_pool_type (rspamd_mempool_t * pool,
enum rspamd_mempool_chain_type pool_type)
{
gsize preallocated_len;
switch (pool_type) {
case RSPAMD_MEMPOOL_NORMAL:
preallocated_len = 32;
break;
case RSPAMD_MEMPOOL_SHARED:
case RSPAMD_MEMPOOL_TMP:
default:
preallocated_len = 2;
break;
}
pool->pools[pool_type] = g_ptr_array_sized_new (preallocated_len);
}
/**
* Get the current pool of the specified type, creating the corresponding
* array if it's absent
* @param pool
* @param pool_type
* @return
*/
static struct _pool_chain *
rspamd_mempool_get_chain (rspamd_mempool_t * pool,
enum rspamd_mempool_chain_type pool_type)
{
gsize len;
g_assert (pool_type >= 0 && pool_type < RSPAMD_MEMPOOL_MAX);
if (pool->pools[pool_type] == NULL) {
rspamd_mempool_create_pool_type (pool, pool_type);
}
len = pool->pools[pool_type]->len;
if (len == 0) {
return NULL;
}
return (g_ptr_array_index (pool->pools[pool_type], len - 1));
}
static void
rspamd_mempool_append_chain (rspamd_mempool_t * pool,
struct _pool_chain *chain,
enum rspamd_mempool_chain_type pool_type)
{
g_assert (pool_type >= 0 && pool_type < RSPAMD_MEMPOOL_MAX);
g_assert (chain != NULL);
if (pool->pools[pool_type] == NULL) {
rspamd_mempool_create_pool_type (pool, pool_type);
}
g_ptr_array_add (pool->pools[pool_type], chain);
}
/**
* Allocate new memory poll
* @param size size of pool's page
* @return new memory pool object
*/
rspamd_mempool_t *
rspamd_mempool_new_ (gsize size, const gchar *tag, const gchar *loc)
{
rspamd_mempool_t *new;
gpointer map;
unsigned char uidbuf[10];
const gchar hexdigits[] = "0123456789abcdef";
unsigned i;
/* Allocate statistic structure if it is not allocated before */
if (mem_pool_stat == NULL) {
#if defined(HAVE_MMAP_ANON)
map = mmap (NULL,
sizeof (rspamd_mempool_stat_t),
PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED,
-1,
0);
if (map == MAP_FAILED) {
msg_err ("cannot allocate %z bytes, aborting",
sizeof (rspamd_mempool_stat_t));
abort ();
}
mem_pool_stat = (rspamd_mempool_stat_t *)map;
#elif defined(HAVE_MMAP_ZERO)
gint fd;
fd = open ("/dev/zero", O_RDWR);
g_assert (fd != -1);
map = mmap (NULL,
sizeof (rspamd_mempool_stat_t),
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd,
0);
if (map == MAP_FAILED) {
msg_err ("cannot allocate %z bytes, aborting",
sizeof (rspamd_mempool_stat_t));
abort ();
}
mem_pool_stat = (rspamd_mempool_stat_t *)map;
#else
# error No mmap methods are defined
#endif
memset (map, 0, sizeof (rspamd_mempool_stat_t));
}
if (!env_checked) {
/* Check G_SLICE=always-malloc to allow memory pool debug */
const char *g_slice;
g_slice = getenv ("VALGRIND");
if (g_slice != NULL) {
always_malloc = TRUE;
}
env_checked = TRUE;
}
new = g_malloc0 (sizeof (rspamd_mempool_t));
new->entry = rspamd_mempool_get_entry (loc);
new->destructors = g_array_sized_new (FALSE, FALSE,
sizeof (struct _pool_destructors), 32);
rspamd_mempool_create_pool_type (new, RSPAMD_MEMPOOL_NORMAL);
/* Set it upon first call of set variable */
new->elt_len = new->entry->cur_suggestion;
if (tag) {
rspamd_strlcpy (new->tag.tagname, tag, sizeof (new->tag.tagname));
}
else {
new->tag.tagname[0] = '\0';
}
/* Generate new uid */
ottery_rand_bytes (uidbuf, sizeof (uidbuf));
for (i = 0; i < G_N_ELEMENTS (uidbuf); i ++) {
new->tag.uid[i * 2] = hexdigits[(uidbuf[i] >> 4) & 0xf];
new->tag.uid[i * 2 + 1] = hexdigits[uidbuf[i] & 0xf];
}
new->tag.uid[19] = '\0';
mem_pool_stat->pools_allocated++;
return new;
}
static void *
memory_pool_alloc_common (rspamd_mempool_t * pool, gsize size,
enum rspamd_mempool_chain_type pool_type)
{
guint8 *tmp;
struct _pool_chain *new, *cur;
gsize free = 0;
if (pool) {
POOL_MTX_LOCK ();
if (always_malloc && pool_type != RSPAMD_MEMPOOL_SHARED) {
void *ptr;
ptr = g_malloc (size);
POOL_MTX_UNLOCK ();
if (pool->trash_stack == NULL) {
pool->trash_stack = g_ptr_array_sized_new (128);
}
g_ptr_array_add (pool->trash_stack, ptr);
return ptr;
}
cur = rspamd_mempool_get_chain (pool, pool_type);
/* Find free space in pool chain */
if (cur) {
free = pool_chain_free (cur);
}
if (cur == NULL || free < size) {
/* Allocate new chain element */
if (pool->elt_len >= size + MEM_ALIGNMENT) {
pool->entry->elts[pool->entry->cur_elts].fragmentation += size;
new = rspamd_mempool_chain_new (pool->elt_len + MEM_ALIGNMENT,
pool_type);
}
else {
mem_pool_stat->oversized_chunks++;
g_atomic_int_add (&mem_pool_stat->fragmented_size,
free);
pool->entry->elts[pool->entry->cur_elts].fragmentation += free;
new = rspamd_mempool_chain_new (
size + pool->elt_len + MEM_ALIGNMENT, pool_type);
}
/* Connect to pool subsystem */
rspamd_mempool_append_chain (pool, new, pool_type);
/* No need to align again */
tmp = new->pos;
new->pos = tmp + size;
POOL_MTX_UNLOCK ();
return tmp;
}
/* No need to allocate page */
tmp = align_ptr (cur->pos, MEM_ALIGNMENT);
cur->pos = tmp + size;
POOL_MTX_UNLOCK ();
return tmp;
}
return NULL;
}
void *
rspamd_mempool_alloc (rspamd_mempool_t * pool, gsize size)
{
return memory_pool_alloc_common (pool, size, RSPAMD_MEMPOOL_NORMAL);
}
void *
rspamd_mempool_alloc_tmp (rspamd_mempool_t * pool, gsize size)
{
return memory_pool_alloc_common (pool, size, RSPAMD_MEMPOOL_TMP);
}
void *
rspamd_mempool_alloc0 (rspamd_mempool_t * pool, gsize size)
{
void *pointer = rspamd_mempool_alloc (pool, size);
if (pointer) {
memset (pointer, 0, size);
}
return pointer;
}
void *
rspamd_mempool_alloc0_tmp (rspamd_mempool_t * pool, gsize size)
{
void *pointer = rspamd_mempool_alloc_tmp (pool, size);
if (pointer) {
memset (pointer, 0, size);
}
return pointer;
}
void *
rspamd_mempool_alloc0_shared (rspamd_mempool_t * pool, gsize size)
{
void *pointer = rspamd_mempool_alloc_shared (pool, size);
if (pointer) {
memset (pointer, 0, size);
}
return pointer;
}
void *
rspamd_mempool_alloc_shared (rspamd_mempool_t * pool, gsize size)
{
return memory_pool_alloc_common (pool, size, RSPAMD_MEMPOOL_SHARED);
}
gchar *
rspamd_mempool_strdup (rspamd_mempool_t * pool, const gchar *src)
{
gsize len;
gchar *newstr;
if (src == NULL) {
return NULL;
}
len = strlen (src);
newstr = rspamd_mempool_alloc (pool, len + 1);
memcpy (newstr, src, len);
newstr[len] = '\0';
return newstr;
}
gchar *
rspamd_mempool_fstrdup (rspamd_mempool_t * pool, const struct f_str_s *src)
{
gchar *newstr;
if (src == NULL) {
return NULL;
}
newstr = rspamd_mempool_alloc (pool, src->len + 1);
memcpy (newstr, src->str, src->len);
newstr[src->len] = '\0';
return newstr;
}
gchar *
rspamd_mempool_ftokdup (rspamd_mempool_t *pool, const rspamd_ftok_t *src)
{
gchar *newstr;
if (src == NULL) {
return NULL;
}
newstr = rspamd_mempool_alloc (pool, src->len + 1);
memcpy (newstr, src->begin, src->len);
newstr[src->len] = '\0';
return newstr;
}
void
rspamd_mempool_add_destructor_full (rspamd_mempool_t * pool,
rspamd_mempool_destruct_t func,
void *data,
const gchar *function,
const gchar *line)
{
struct _pool_destructors cur;
POOL_MTX_LOCK ();
cur.func = func;
cur.data = data;
cur.function = function;
cur.loc = line;
g_array_append_val (pool->destructors, cur);
POOL_MTX_UNLOCK ();
}
void
rspamd_mempool_replace_destructor (rspamd_mempool_t * pool,
rspamd_mempool_destruct_t func,
void *old_data,
void *new_data)
{
struct _pool_destructors *tmp;
guint i;
for (i = 0; i < pool->destructors->len; i ++) {
tmp = &g_array_index (pool->destructors, struct _pool_destructors, i);
if (tmp->func == func && tmp->data == old_data) {
tmp->func = func;
tmp->data = new_data;
break;
}
}
}
static gint
cmp_int (gconstpointer a, gconstpointer b)
{
gint i1 = *(const gint *)a, i2 = *(const gint *)b;
return i1 - i2;
}
static void
rspamd_mempool_adjust_entry (struct rspamd_mempool_entry_point *e)
{
gint sz[G_N_ELEMENTS (e->elts)], sel_pos, sel_neg;
guint i, jitter;
for (i = 0; i < G_N_ELEMENTS (sz); i ++) {
sz[i] = e->elts[i].fragmentation - (gint)e->elts[i].leftover;
}
qsort (sz, G_N_ELEMENTS (sz), sizeof (gint), cmp_int);
jitter = rspamd_random_uint64_fast () % 10;
/*
* Take stochaistic quantiles
*/
sel_pos = sz[50 + jitter];
sel_neg = sz[4 + jitter];
if (sel_neg > 0) {
/* We need to increase our suggestion */
e->cur_suggestion *= (1 + (((double)sel_pos) / e->cur_suggestion)) * 1.5;
}
else if (-sel_neg > sel_pos) {
/* We need to reduce current suggestion */
e->cur_suggestion /= (1 + (((double)-sel_neg) / e->cur_suggestion)) * 1.5;
}
else {
/* We still want to grow */
e->cur_suggestion *= (1 + (((double)sel_pos) / e->cur_suggestion)) * 1.5;
}
/* Some sane limits counting mempool architecture */
if (e->cur_suggestion < 1024) {
e->cur_suggestion = 1024;
}
else if (e->cur_suggestion > 1024 * 1024 * 10) {
e->cur_suggestion = 1024 * 1024 * 10;
}
memset (e->elts, 0, sizeof (e->elts));
}
void
rspamd_mempool_delete (rspamd_mempool_t * pool)
{
struct _pool_chain *cur;
struct _pool_destructors *destructor;
gpointer ptr;
guint i, j;
gsize len;
POOL_MTX_LOCK ();
/* Find free space in pool chain */
cur = NULL;
if (pool->pools[RSPAMD_MEMPOOL_NORMAL] != NULL &&
pool->pools[RSPAMD_MEMPOOL_NORMAL]->len > 0) {
cur = g_ptr_array_index (pool->pools[RSPAMD_MEMPOOL_NORMAL],
pool->pools[RSPAMD_MEMPOOL_NORMAL]->len - 1);
}
if (cur) {
pool->entry->elts[pool->entry->cur_elts].leftover =
pool_chain_free (cur);
pool->entry->cur_elts = (pool->entry->cur_elts + 1) %
G_N_ELEMENTS (pool->entry->elts);
if (pool->entry->cur_elts == 0) {
rspamd_mempool_adjust_entry (pool->entry);
}
}
/* Call all pool destructors */
for (i = 0; i < pool->destructors->len; i ++) {
destructor = &g_array_index (pool->destructors, struct _pool_destructors, i);
/* Avoid calling destructors for NULL pointers */
if (destructor->data != NULL) {
destructor->func (destructor->data);
}
}
g_array_free (pool->destructors, TRUE);
for (i = 0; i < G_N_ELEMENTS (pool->pools); i ++) {
if (pool->pools[i]) {
for (j = 0; j < pool->pools[i]->len; j++) {
cur = g_ptr_array_index (pool->pools[i], j);
g_atomic_int_add (&mem_pool_stat->bytes_allocated,
-((gint)cur->len));
g_atomic_int_add (&mem_pool_stat->chunks_allocated, -1);
len = cur->len + sizeof (struct _pool_chain);
if (i == RSPAMD_MEMPOOL_SHARED) {
munmap ((void *)cur, len);
}
else {
g_free (cur);
}
}
g_ptr_array_free (pool->pools[i], TRUE);
}
}
if (pool->variables) {
g_hash_table_destroy (pool->variables);
}
if (pool->trash_stack) {
for (i = 0; i < pool->trash_stack->len; i++) {
ptr = g_ptr_array_index (pool->trash_stack, i);
g_free (ptr);
}
g_ptr_array_free (pool->trash_stack, TRUE);
}
g_atomic_int_inc (&mem_pool_stat->pools_freed);
POOL_MTX_UNLOCK ();
g_free (pool);
}
void
rspamd_mempool_cleanup_tmp (rspamd_mempool_t * pool)
{
struct _pool_chain *cur;
guint i;
POOL_MTX_LOCK ();
if (pool->pools[RSPAMD_MEMPOOL_TMP]) {
for (i = 0; i < pool->pools[RSPAMD_MEMPOOL_TMP]->len; i++) {
cur = g_ptr_array_index (pool->pools[RSPAMD_MEMPOOL_TMP], i);
g_atomic_int_add (&mem_pool_stat->bytes_allocated,
-((gint)cur->len));
g_atomic_int_add (&mem_pool_stat->chunks_allocated, -1);
g_free (cur);
}
g_ptr_array_free (pool->pools[RSPAMD_MEMPOOL_TMP], TRUE);
pool->pools[RSPAMD_MEMPOOL_TMP] = NULL;
}
g_atomic_int_inc (&mem_pool_stat->pools_freed);
POOL_MTX_UNLOCK ();
}
void
rspamd_mempool_stat (rspamd_mempool_stat_t * st)
{
if (mem_pool_stat != NULL) {
st->pools_allocated = mem_pool_stat->pools_allocated;
st->pools_freed = mem_pool_stat->pools_freed;
st->shared_chunks_allocated = mem_pool_stat->shared_chunks_allocated;
st->bytes_allocated = mem_pool_stat->bytes_allocated;
st->chunks_allocated = mem_pool_stat->chunks_allocated;
st->shared_chunks_allocated = mem_pool_stat->shared_chunks_allocated;
st->chunks_freed = mem_pool_stat->chunks_freed;
st->oversized_chunks = mem_pool_stat->oversized_chunks;
}
}
void
rspamd_mempool_stat_reset (void)
{
if (mem_pool_stat != NULL) {
memset (mem_pool_stat, 0, sizeof (rspamd_mempool_stat_t));
}
}
gsize
rspamd_mempool_suggest_size_ (const char *loc)
{
return 0;
}
#if !defined(HAVE_PTHREAD_PROCESS_SHARED) || defined(DISABLE_PTHREAD_MUTEX)
/*
* Own emulation
*/
static inline gint
__mutex_spin (rspamd_mempool_mutex_t * mutex)
{
/* check spin count */
if (g_atomic_int_dec_and_test (&mutex->spin)) {
/* This may be deadlock, so check owner of this lock */
if (mutex->owner == getpid ()) {
/* This mutex was locked by calling process, so it is just double lock and we can easily unlock it */
g_atomic_int_set (&mutex->spin, MUTEX_SPIN_COUNT);
return 0;
}
else if (kill (mutex->owner, 0) == -1) {
/* Owner process was not found, so release lock */
g_atomic_int_set (&mutex->spin, MUTEX_SPIN_COUNT);
return 0;
}
/* Spin again */
g_atomic_int_set (&mutex->spin, MUTEX_SPIN_COUNT);
}
#ifdef HAVE_SCHED_YIELD
(void)sched_yield ();
#elif defined(HAVE_NANOSLEEP)
struct timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = MUTEX_SLEEP_TIME;
/* Spin */
while (nanosleep (&ts, &ts) == -1 && errno == EINTR) ;
#else
# error No methods to spin are defined
#endif
return 1;
}
static void
memory_pool_mutex_spin (rspamd_mempool_mutex_t * mutex)
{
while (!g_atomic_int_compare_and_exchange (&mutex->lock, 0, 1)) {
if (!__mutex_spin (mutex)) {
return;
}
}
}
rspamd_mempool_mutex_t *
rspamd_mempool_get_mutex (rspamd_mempool_t * pool)
{
rspamd_mempool_mutex_t *res;
if (pool != NULL) {
res =
rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_mutex_t));
res->lock = 0;
res->owner = 0;
res->spin = MUTEX_SPIN_COUNT;
return res;
}
return NULL;
}
void
rspamd_mempool_lock_mutex (rspamd_mempool_mutex_t * mutex)
{
memory_pool_mutex_spin (mutex);
mutex->owner = getpid ();
}
void
rspamd_mempool_unlock_mutex (rspamd_mempool_mutex_t * mutex)
{
mutex->owner = 0;
(void)g_atomic_int_compare_and_exchange (&mutex->lock, 1, 0);
}
rspamd_mempool_rwlock_t *
rspamd_mempool_get_rwlock (rspamd_mempool_t * pool)
{
rspamd_mempool_rwlock_t *lock;
lock = rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_rwlock_t));
lock->__r_lock = rspamd_mempool_get_mutex (pool);
lock->__w_lock = rspamd_mempool_get_mutex (pool);
return lock;
}
void
rspamd_mempool_rlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
/* Spin on write lock */
while (g_atomic_int_get (&lock->__w_lock->lock)) {
if (!__mutex_spin (lock->__w_lock)) {
break;
}
}
g_atomic_int_inc (&lock->__r_lock->lock);
lock->__r_lock->owner = getpid ();
}
void
rspamd_mempool_wlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
/* Spin on write lock first */
rspamd_mempool_lock_mutex (lock->__w_lock);
/* Now we have write lock set up */
/* Wait all readers */
while (g_atomic_int_get (&lock->__r_lock->lock)) {
__mutex_spin (lock->__r_lock);
}
}
void
rspamd_mempool_runlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
if (g_atomic_int_get (&lock->__r_lock->lock)) {
(void)g_atomic_int_dec_and_test (&lock->__r_lock->lock);
}
}
void
rspamd_mempool_wunlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
rspamd_mempool_unlock_mutex (lock->__w_lock);
}
#else
/*
* Pthread bases shared mutexes
*/
rspamd_mempool_mutex_t *
rspamd_mempool_get_mutex (rspamd_mempool_t * pool)
{
rspamd_mempool_mutex_t *res;
pthread_mutexattr_t mattr;
if (pool != NULL) {
res =
rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_mutex_t));
pthread_mutexattr_init (&mattr);
pthread_mutexattr_setpshared (&mattr, PTHREAD_PROCESS_SHARED);
pthread_mutexattr_setrobust (&mattr, PTHREAD_MUTEX_ROBUST);
pthread_mutex_init (res, &mattr);
rspamd_mempool_add_destructor (pool,
(rspamd_mempool_destruct_t)pthread_mutex_destroy, res);
pthread_mutexattr_destroy (&mattr);
return res;
}
return NULL;
}
void
rspamd_mempool_lock_mutex (rspamd_mempool_mutex_t * mutex)
{
pthread_mutex_lock (mutex);
}
void
rspamd_mempool_unlock_mutex (rspamd_mempool_mutex_t * mutex)
{
pthread_mutex_unlock (mutex);
}
rspamd_mempool_rwlock_t *
rspamd_mempool_get_rwlock (rspamd_mempool_t * pool)
{
rspamd_mempool_rwlock_t *res;
pthread_rwlockattr_t mattr;
if (pool != NULL) {
res =
rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_rwlock_t));
pthread_rwlockattr_init (&mattr);
pthread_rwlockattr_setpshared (&mattr, PTHREAD_PROCESS_SHARED);
pthread_rwlock_init (res, &mattr);
rspamd_mempool_add_destructor (pool,
(rspamd_mempool_destruct_t)pthread_rwlock_destroy, res);
pthread_rwlockattr_destroy (&mattr);
return res;
}
return NULL;
}
void
rspamd_mempool_rlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
pthread_rwlock_rdlock (lock);
}
void
rspamd_mempool_wlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
pthread_rwlock_wrlock (lock);
}
void
rspamd_mempool_runlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
pthread_rwlock_unlock (lock);
}
void
rspamd_mempool_wunlock_rwlock (rspamd_mempool_rwlock_t * lock)
{
pthread_rwlock_unlock (lock);
}
#endif
void
rspamd_mempool_set_variable (rspamd_mempool_t *pool,
const gchar *name,
gpointer value,
rspamd_mempool_destruct_t destructor)
{
if (pool->variables == NULL) {
pool->variables = g_hash_table_new (rspamd_str_hash, rspamd_str_equal);
}
g_hash_table_insert (pool->variables, rspamd_mempool_strdup (pool,
name), value);
if (destructor != NULL) {
rspamd_mempool_add_destructor (pool, destructor, value);
}
}
gpointer
rspamd_mempool_get_variable (rspamd_mempool_t *pool, const gchar *name)
{
if (pool->variables == NULL) {
return NULL;
}
return g_hash_table_lookup (pool->variables, name);
}
void
rspamd_mempool_remove_variable (rspamd_mempool_t *pool, const gchar *name)
{
if (pool->variables != NULL) {
g_hash_table_remove (pool->variables, name);
}
}
GList *
rspamd_mempool_glist_prepend (rspamd_mempool_t *pool, GList *l, gpointer p)
{
GList *cell;
cell = rspamd_mempool_alloc (pool, sizeof (*cell));
cell->prev = NULL;
cell->data = p;
if (l == NULL) {
cell->next = NULL;
}
else {
cell->next = l;
l->prev = cell;
}
return cell;
}
GList *
rspamd_mempool_glist_append (rspamd_mempool_t *pool, GList *l, gpointer p)
{
GList *cell, *cur;
cell = rspamd_mempool_alloc (pool, sizeof (*cell));
cell->next = NULL;
cell->data = p;
if (l) {
for (cur = l; cur->next != NULL; cur = cur->next) {}
cur->next = cell;
cell->prev = cur;
}
else {
l = cell;
l->prev = NULL;
}
return l;
}
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