ring_buffer_has_space

Name:ring_buffer_has_space

Proto:static __always_inline bool ring_buffer_has_space(unsigned long head, unsigned long tail, unsigned long data_size, unsigned int size, bool backward)

Type:bool

Parameter:

Type	Parameter	Name
unsigned long	head
unsigned long	tail
unsigned long	data_size
unsigned int	size
bool	backward

142

If Not backward Then Return Return space available, 0..size-1. We always leave one free charas a completely full buffer has head == tail, which is the same asempty. (head, tail, data_size) >= size

144

Else Return Return space available, 0..size-1. We always leave one free charas a completely full buffer has head == tail, which is the same asempty. (tail, head, data_size) >= size

**Caller**
Name	Describe
__perf_output_begin

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