1 files changed, 67 insertions, 0 deletions
diff --git a/accel-pptpd/triton/mempool.c b/accel-pptpd/triton/mempool.c
new file mode 100644
index 0000000..973fec5
--- /dev/null
+++ b/accel-pptpd/triton/mempool.c
@@ -0,0 +1,67 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "triton_p.h"
+
+struct _mempool_t
+{
+	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 magic;
+	char ptr[0];
+};
+
+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();
+
+	return (mempool_t *)p;
+}
+
+void *mempool_alloc(mempool_t *pool)
+{
+	struct _mempool_t *p = (struct _mempool_t *)pool;
+	struct _item_t *it;
+
+	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);
+		return it->ptr;
+	}
+	spin_unlock(&p->lock);
+	it = malloc(sizeof(*it) + p->size);
+	it->owner = p;
+	it->magic = p->magic;
+	return it->ptr;
+}
+
+void mempool_free(void *ptr)
+{
+	struct _item_t *it = container_of(ptr, typeof(*it), ptr);
+
+	if (it->magic != it->owner->magic) {
+		triton_log_error("mempool: memory corruption detected");
+		abort();
+	}
+	spin_lock(&it->owner->lock);
+	list_add_tail(&it->entry,&it->owner->items);
+	spin_unlock(&it->owner->lock);
+}
+