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kernel/address_arbiter: Minor tidying up 

- Invert conditions into guard clases where applicable.
- Mark std::vector parameter of WakeThreads as const
This commit is contained in:
Lioncash 2019-03-05 12:22:13 -05:00
parent ec6664f6d6
commit 9d9676f620
1 changed files with 18 additions and 18 deletions
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34
src/core/hle/kernel/address_arbiter.cpp
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@ -21,12 +21,13 @@
namespace Kernel { namespace Kernel {
namespace { namespace {
// Wake up num_to_wake (or all) threads in a vector. // Wake up num_to_wake (or all) threads in a vector.
void WakeThreads(std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) { void WakeThreads(const std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) {
// Only process up to 'target' threads, unless 'target' is <= 0, in which case process // Only process up to 'target' threads, unless 'target' is <= 0, in which case process
// them all. // them all.
std::size_t last = waiting_threads.size(); std::size_t last = waiting_threads.size();
if (num_to_wake > 0) if (num_to_wake > 0) {
last = num_to_wake; last = num_to_wake;
}
// Signal the waiting threads. // Signal the waiting threads.
for (std::size_t i = 0; i < last; i++) { for (std::size_t i = 0; i < last; i++) {
@ -42,8 +43,7 @@ AddressArbiter::AddressArbiter() = default;
AddressArbiter::~AddressArbiter() = default; AddressArbiter::~AddressArbiter() = default;
ResultCode AddressArbiter::SignalToAddress(VAddr address, s32 num_to_wake) { ResultCode AddressArbiter::SignalToAddress(VAddr address, s32 num_to_wake) {
std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address); const std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address);
WakeThreads(waiting_threads, num_to_wake); WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS; return RESULT_SUCCESS;
} }
@ -55,12 +55,11 @@ ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32
return ERR_INVALID_ADDRESS_STATE; return ERR_INVALID_ADDRESS_STATE;
} }
if (static_cast<s32>(Memory::Read32(address)) == value) { if (static_cast<s32>(Memory::Read32(address)) != value) {
Memory::Write32(address, static_cast<u32>(value + 1));
} else {
return ERR_INVALID_STATE; return ERR_INVALID_STATE;
} }
Memory::Write32(address, static_cast<u32>(value + 1));
return SignalToAddress(address, num_to_wake); return SignalToAddress(address, num_to_wake);
} }
@ -72,7 +71,7 @@ ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr a
} }
// Get threads waiting on the address. // Get threads waiting on the address.
std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address); const std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address);
// Determine the modified value depending on the waiting count. // Determine the modified value depending on the waiting count.
s32 updated_value; s32 updated_value;
@ -84,12 +83,11 @@ ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr a
updated_value = value; updated_value = value;
} }
if (static_cast<s32>(Memory::Read32(address)) == value) { if (static_cast<s32>(Memory::Read32(address)) != value) {
Memory::Write32(address, static_cast<u32>(updated_value));
} else {
return ERR_INVALID_STATE; return ERR_INVALID_STATE;
} }
Memory::Write32(address, static_cast<u32>(updated_value));
WakeThreads(waiting_threads, num_to_wake); WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS; return RESULT_SUCCESS;
} }
@ -101,14 +99,15 @@ ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s6
return ERR_INVALID_ADDRESS_STATE; return ERR_INVALID_ADDRESS_STATE;
} }
s32 cur_value = static_cast<s32>(Memory::Read32(address)); const s32 cur_value = static_cast<s32>(Memory::Read32(address));
if (cur_value < value) { if (cur_value >= value) {
return ERR_INVALID_STATE;
}
if (should_decrement) { if (should_decrement) {
Memory::Write32(address, static_cast<u32>(cur_value - 1)); Memory::Write32(address, static_cast<u32>(cur_value - 1));
} }
} else {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero. // Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) { if (timeout == 0) {
return RESULT_TIMEOUT; return RESULT_TIMEOUT;
@ -154,9 +153,10 @@ std::vector<SharedPtr<Thread>> AddressArbiter::GetThreadsWaitingOnAddress(VAddr
const auto& thread_list = scheduler.GetThreadList(); const auto& thread_list = scheduler.GetThreadList();
for (const auto& thread : thread_list) { for (const auto& thread : thread_list) {
if (thread->GetArbiterWaitAddress() == arb_addr) if (thread->GetArbiterWaitAddress() == arb_addr) {
waiting_threads.push_back(thread); waiting_threads.push_back(thread);
} }
}
}; };
// Retrieve all threads that are waiting for this address. // Retrieve all threads that are waiting for this address.