Changes between Version 36 and Version 37 of library_stdio

Timestamp:

Nov 12, 2014, 1:24:22 PM (10 years ago)

Author:

alain

Comment:

--

library_stdio

@@ -137 +137 @@
 
  === 5) void '''giet_nic_tx_move'''( void* buffer ) ===
-This blocking function requires to transfer one container (4K bytes)  from an user space buffer to the Network Controller.
+This blocking function requires to transfer one container (GIET_NIC_CHBUF_SIZE bytes)  from an user buffer to the kernel chbuf allocated to the calling task.
  * '''buffer'''  is the container base address in user space.
+Several user tasks can concurrently access the same chbuf, because the syscall handler takes the lock protecting the chbuf.
 It returns only when the container has been fully transfered.
 The calling task exit if no NIC channel allocated to the task, or in case of timeout.
 
  === 6) void '''giet_nic_rx_move'''( void* buffer ) ===
-This blocking function requires to transfer one container (4K bytes)  from  the Network Controller to an user space buffer.
+This blocking function requires to transfer one container (GIET_NIC_CHBUF_SIZE bytes)  from  the kernel chbuf allocated to the calling task to an user buffer.
  * '''buffer''' is the container base address in user space.
+Several user tasks can concurrently access the same chbuf, because the syscall handler takes the lock protecting the chbuf.
 It returns only when the container has been fully transfered.
 The calling task exit if no NIC channel allocated to the task, or in case of timeout.