Tweak compare_exchange_weak(...) in spin-lock
This commit is contained in:
parent
c72a337f77
commit
04c9f52997
1 changed files with 10 additions and 10 deletions
|
@ -27,7 +27,7 @@ UDPC::LockObj<false> UDPC::SharedSpinLock::spin_read_lock() {
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if(spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if(spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (!write) {
|
||||
++read;
|
||||
spinLock.store(false, std::memory_order_release);
|
||||
|
@ -43,7 +43,7 @@ UDPC::LockObj<false> UDPC::SharedSpinLock::try_spin_read_lock() {
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (!write) {
|
||||
++read;
|
||||
spinLock.store(false, std::memory_order_release);
|
||||
|
@ -62,7 +62,7 @@ void UDPC::SharedSpinLock::read_unlock(UDPC::Badge &&badge) {
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (read > 0) {
|
||||
--read;
|
||||
badge.isValid = false;
|
||||
|
@ -78,7 +78,7 @@ UDPC::LockObj<true> UDPC::SharedSpinLock::spin_write_lock() {
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (!write && read == 0) {
|
||||
write = true;
|
||||
spinLock.store(false, std::memory_order_release);
|
||||
|
@ -94,7 +94,7 @@ UDPC::LockObj<true> UDPC::SharedSpinLock::try_spin_write_lock() {
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (!write && read == 0) {
|
||||
write = true;
|
||||
spinLock.store(false, std::memory_order_release);
|
||||
|
@ -113,7 +113,7 @@ void UDPC::SharedSpinLock::write_unlock(UDPC::Badge &&badge) {
|
|||
bool expected;
|
||||
while(true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (write) {
|
||||
write = false;
|
||||
badge.isValid = false;
|
||||
|
@ -130,7 +130,7 @@ UDPC::LockObj<false> UDPC::SharedSpinLock::trade_write_for_read_lock(UDPC::LockO
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (write && read == 0) {
|
||||
read = 1;
|
||||
write = false;
|
||||
|
@ -153,7 +153,7 @@ UDPC::LockObj<false> UDPC::SharedSpinLock::try_trade_write_for_read_lock(UDPC::L
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (write && read == 0) {
|
||||
read = 1;
|
||||
write = false;
|
||||
|
@ -176,7 +176,7 @@ UDPC::LockObj<true> UDPC::SharedSpinLock::trade_read_for_write_lock(UDPC::LockOb
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (!write && read == 1) {
|
||||
read = 0;
|
||||
write = true;
|
||||
|
@ -199,7 +199,7 @@ UDPC::LockObj<true> UDPC::SharedSpinLock::try_trade_read_for_write_lock(UDPC::Lo
|
|||
bool expected;
|
||||
while (true) {
|
||||
expected = false;
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire, std::memory_order_relaxed)) {
|
||||
if (spinLock.compare_exchange_weak(expected, true, std::memory_order_acquire)) {
|
||||
if (!write && read == 1) {
|
||||
read = 0;
|
||||
write = true;
|
||||
|
|
Loading…
Reference in a new issue