Function: value_wait

Product	Supported (√/x)
Ascend 950PR/Ascend 950DT	√
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas training products	x
Atlas inference products	x
Atlas 200I/500 A2 inference products	x

Unblocks the data in the specified memory when the data meets certain conditions.

C Prototype

aclError aclrtValueWait(void* devAddr, uint64_t value, uint32_t flag, aclrtStream stream)

Python Function

ret = acl.rt.value_wait(devAddr, value, flag, stream)

Parameter	Description
devAddr	Int, device memory address. The valid memory bit width of dev_addr is 64 bits.
value	Int, value to be compared with the data in the memory.
flag	Int, comparison mode. The data will be unblocked after the conditions are met. The options are as follows: ACL_STREAM_WAIT_VALUE_GEQ = 0x0; # Waits until (int64_t) (devAddr- value) >= 0. ACL_STREAM_WAIT_VALUE_EQ = 0x1; # Waits until devAddr == value. ACL_STREAM_WAIT_VALUE_AND = 0x2; # Waits until (devAddr & value) != 0. ACL_STREAM_WAIT_VALUE_NOR = 0x3; # Waits until ~(devAddr \| value) != 0.
stream	Int, stream. The value 0 can be passed, indicating that the default stream is used.

Return Value	Description
ret	Int, error code. 0 on success; else, failure.

Parent topic: Stream Memory Operations