1 files changed, 179 insertions, 0 deletions

diff --git a/accel-pptpd/triton/mempool.c b/accel-pptpd/triton/mempool.c
new file mode 100644
index 00000000..c96c3ba2
--- /dev/null
+++ b/accel-pptpd/triton/mempool.c
@@ -0,0 +1,179 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+
+#include "triton_p.h"
+
+#include "memdebug.h"
+
+#define MAGIC1 0x2233445566778899llu
+
+struct _mempool_t
+{
+	struct list_head entry;
+	int size;
+	struct list_head items;
+	spinlock_t lock;
+	uint64_t magic;
+};
+
+struct _item_t
+{
+	struct _mempool_t *owner;
+	struct list_head entry;
+	uint64_t magic2;
+	uint64_t magic1;
+	char ptr[0];
+};
+
+static LIST_HEAD(pools);
+static spinlock_t pools_lock = SPINLOCK_INITIALIZER;
+
+__export mempool_t *mempool_create(int size)
+{
+	struct _mempool_t *p = _malloc(sizeof(*p));
+
+	memset(p, 0, sizeof(*p));
+	INIT_LIST_HEAD(&p->items);
+	spinlock_init(&p->lock);
+	p->size = size;
+	p->magic = (uint64_t)random() * (uint64_t)random();
+
+	spin_lock(&pools_lock);
+	list_add_tail(&p->entry, &pools);
+	spin_unlock(&pools_lock);
+
+	return (mempool_t *)p;
+}
+
+#ifndef MEMDEBUG
+__export void *mempool_alloc(mempool_t *pool)
+{
+	struct _mempool_t *p = (struct _mempool_t *)pool;
+	struct _item_t *it;
+	uint32_t size = sizeof(*it) + p->size + 8;
+
+	spin_lock(&p->lock);
+	if (!list_empty(&p->items)) {
+		it = list_entry(p->items.next, typeof(*it), entry);
+		list_del(&it->entry);
+		spin_unlock(&p->lock);
+		
+		__sync_fetch_and_sub(&triton_stat.mempool_available, size);
+		
+		it->magic1 = MAGIC1;
+
+		return it->ptr;
+	}
+	spin_unlock(&p->lock);
+
+	it = _malloc(size);
+	if (!it) {
+		triton_log_error("mempool: out of memory\n");
+		return NULL;
+	}
+	it->owner = p;
+	it->magic1 = MAGIC1;
+	it->magic2 = p->magic;
+	*(uint64_t*)(it->data + p->size) = it->magic2;
+
+	__sync_fetch_and_add(&triton_stat.mempool_allocated, size);
+
+	return it->ptr;
+}
+#endif
+
+void __export *mempool_alloc_md(mempool_t *pool, const char *fname, int line)
+{
+	struct _mempool_t *p = (struct _mempool_t *)pool;
+	struct _item_t *it;
+	uint32_t size = sizeof(*it) + p->size + 8;
+
+	spin_lock(&p->lock);
+	if (!list_empty(&p->items)) {
+		it = list_entry(p->items.next, typeof(*it), entry);
+		list_del(&it->entry);
+		spin_unlock(&p->lock);
+		
+		__sync_fetch_and_sub(&triton_stat.mempool_available, size);
+		
+		it->magic1 = MAGIC1;
+
+		return it->ptr;
+	}
+	spin_unlock(&p->lock);
+
+	it = md_malloc(size, fname, line);
+	if (!it) {
+		triton_log_error("mempool: out of memory\n");
+		return NULL;
+	}
+	it->owner = p;
+	it->magic2 = p->magic;
+	it->magic1 = MAGIC1;
+	*(uint64_t*)(it->ptr + p->size) = it->magic2;
+
+	__sync_fetch_and_add(&triton_stat.mempool_allocated, size);
+
+	return it->ptr;
+}
+
+
+__export void mempool_free(void *ptr)
+{
+	struct _item_t *it = container_of(ptr, typeof(*it), ptr);
+	uint32_t size = sizeof(*it) + it->owner->size + 8;
+
+	if (it->magic1 != MAGIC1) {
+		triton_log_error("mempool: memory corruption detected");
+		abort();
+	}
+
+	if (it->magic2 != it->owner->magic) {
+		triton_log_error("mempool: memory corruption detected");
+		abort();
+	}
+
+	if (it->magic2 != *(uint64_t*)(it->ptr + it->owner->size)) {
+		triton_log_error("mempool: memory corruption detected");
+		abort();
+	}
+
+	it->magic1 = 0;
+
+	spin_lock(&it->owner->lock);
+	list_add_tail(&it->entry,&it->owner->items);
+	spin_unlock(&it->owner->lock);
+
+	__sync_fetch_and_add(&triton_stat.mempool_available, size);
+}
+
+void sigclean(int num)
+{
+	struct _mempool_t *p;
+	struct _item_t *it;
+	uint32_t size;
+
+	triton_log_error("mempool: clean\n");
+
+	spin_lock(&pools_lock);
+	list_for_each_entry(p, &pools, entry) {
+		size = sizeof(*it) + p->size;
+		spin_lock(&p->lock);
+		while (!list_empty(&p->items)) {
+			it = list_entry(p->items.next, typeof(*it), entry);
+			list_del(&it->entry);
+			_free(it);
+			__sync_fetch_and_sub(&triton_stat.mempool_allocated, size);
+			__sync_fetch_and_sub(&triton_stat.mempool_available, size);
+		}
+		spin_unlock(&p->lock);
+	}
+	spin_unlock(&pools_lock);
+}
+
+static void __init init(void)
+{
+	signal(35, sigclean);
+}