Altera Embedded Peripherals IP - Manual (Page 261)

altera_avalon_mutex_first_lock()
Prototype:
int altera_avalon_mutex_first_lock(alt_mutex_dev* dev)
Thread-safe: Yes.
Available from
ISR:
No.
Include: < altera_avalon_mutex.h >
Parameters:
dev
—the mutex device to test.
Returns: Returns 1 if this mutex has not been released since reset, otherwise returns 0.
Description:
altera_avalon_mutex_first_lock()
determines whether this mutex has
been released since reset.
altera_avalon_mutex_lock()
Prototype:
void altera_avalon_mutex_lock(alt_mutex_dev* dev, alt_u32 value)
Thread-safe: Yes.
Available from
ISR:
No.
Include: <altera_avalon_mutex.h>
Parameters:
dev
—the mutex device to acquire.
value
—the new value to write to the mutex.
Returns: —
Description:
altera_avalon_mutex_lock()
is a blocking routine that acquires a hardware
mutex, and at the same time, loads the mutex with the
value
parameter.
altera_avalon_mutex_open()
Prototype:
alt_mutex_dev* alt_hardware_mutex_open(const char* name)
Thread-safe: Yes.
Available from
ISR:
No.
Include: < altera_avalon_mutex.h >
Parameters:
name
—the name of the mutex device to open.
Returns: A pointer to the mutex device structure associated with the supplied name, or
NULL if no corresponding mutex device structure was found.
Description:
altera_avalon_mutex_open()
retrieves a pointer to a hardware mutex device
structure.
26-4 altera_avalon_mutex_first_lock()
UG-01085
2014.24.07
Altera Corporation Mutex Core
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