Is CFG_TUD_TASK_QUEUE_SZ the buffer size of the queue or item size of the queue

[mttbx]

In usbd.c there's CFG_TUD_TASK_QUEUE_SZ defualt value:

#ifndef CFG_TUD_TASK_QUEUE_SZ
  #define CFG_TUD_TASK_QUEUE_SZ   16
#endif
OSAL_QUEUE_DEF(usbd_int_set, _usbd_qdef, CFG_TUD_TASK_QUEUE_SZ, dcd_event_t);

If CFG_TUD_TASK_QUEUE_SZ is the buffer size, it's too small to contain more than one dec_event_t.
But when I see osal_freertos.h and others, they use CFG_TUD_TASK_QUEUE_SZ as buffer size. If CFG_TUD_TASK_QUEUE_SZ is the item size, the buffer size should be _depth*sizeof(_type):

#define OSAL_QUEUE_DEF(_int_set, _name, _depth, _type) \
  static _type _name##_##buf[_depth];\
  osal_queue_def_t _name = { .depth = _depth, .item_sz = sizeof(_type), .buf = _name##_##buf, OSAL_Q_NAME(_name) }

So what is the meaning of CFG_TUD_TASK_QUEUE_SZ?

[HiFiPhile]

static _type _name##_##buf[_depth];

You can see the type of buf is _type , it's not uint8_t.

Which gives you dcd_event_t buf[16];

[mttbx]

You are right!