61 void mb_init(struct mem_buf* mb, void* buf, size_t sz, size_t align) {  in mb_init()  argument
64     mb->buf = buf;  in mb_init()
65     mb->capacity = sz;  in mb_init()
66     mb->align = align;  in mb_init()
67     mb->curr_size = 0;  in mb_init()
68     mb->pos = 0;  in mb_init()
71 void mb_destroy(struct mem_buf* mb) {  in mb_destroy()  argument
72     mb->buf = NULL;  in mb_destroy()
73     mb->capacity = 0;  in mb_destroy()
74     mb->align = 0;  in mb_destroy()
75     mb->curr_size = 0;  in mb_destroy()
76     mb->pos = 0;  in mb_destroy()
79 static inline bool mb_is_destroyed(struct mem_buf* mb) {  in mb_is_destroyed()  argument
80     return !mb->buf;  in mb_is_destroyed()
83 bool mb_resize(struct mem_buf* mb, size_t sz) {  in mb_resize()  argument
84     if (mb_is_destroyed(mb)) {  in mb_resize()
87     if (sz <= mb->capacity) {  in mb_resize()
88         mb->curr_size = sz;  in mb_resize()
89         mb->pos = 0;  in mb_resize()
95 void* mb_advance_pos(struct mem_buf* mb, size_t sz) {  in mb_advance_pos()  argument
98     if (mb_is_destroyed(mb)) {  in mb_advance_pos()
102     assert(IS_ALIGNED(mb->pos, mb->align));  in mb_advance_pos()
103     assert(mb->curr_size >= mb->pos);  in mb_advance_pos()
105     sz = round_up(sz, mb->align);  in mb_advance_pos()
107     if (sz > (mb->curr_size - mb->pos)) {  in mb_advance_pos()
111     p = (void*)(mb->buf + mb->pos);  in mb_advance_pos()
112     mb->pos += sz;  in mb_advance_pos()
113     assert(IS_ALIGNED(mb->pos, mb->align));  in mb_advance_pos()