#ifndef __GLTHREADS__
#define __GLTHREADS__

typedef struct glthread_node_ {         //GL Node Definition

    struct glthread_node_ *left;
    struct glthread_node_ *right;
} glthread_node_t;

typedef struct glthread_ {              //GL List Definition

    glthread_node_t *head;
    unsigned int offset;
} glthread_t;

void
glthread_add (glthread_t *lst, glthread_node_t *glnode);

void
glthread_remove(glthread_t *lst, glthread_node_t *glnode);

/*Iterative macro to Iterate Over GLThreads*/
#define ITERATE_GL_THREADS_BEGIN(lstptr, struct_type, ptr)      \
{                                                               \
    glthread_node_t *_glnode = NULL, *_next = NULL;             \
    for(_glnode = lstptr->head; _glnode; _glnode = _next){      \
        _next = _glnode->right;                                 \
        ptr = (struct_type *)((char *)_glnode - lstptr->offset);

#define ITERATE_GL_THREADS_ENDS }}

#define glthread_node_init(glnode)  \
    glnode->left = NULL;            \
    glnode->right = NULL;

void
init_glthread(glthread_t *glthread, unsigned int offset);

#define offsetof(struct_name, field_name) \
    ((unsigned int)&((struct_name *)0)->field_name)

#endif /* __GLTHREADS__ */