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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/common/sync_token.h"
#include <sstream>
#include "base/ranges/algorithm.h"
namespace gpu {
SyncToken::SyncToken()
: verified_flush_(false),
namespace_id_(CommandBufferNamespace::INVALID),
release_count_(0) {}
SyncToken::SyncToken(CommandBufferNamespace namespace_id,
CommandBufferId command_buffer_id,
uint64_t release_count)
: verified_flush_(false),
namespace_id_(namespace_id),
command_buffer_id_(command_buffer_id),
release_count_(release_count) {}
SyncToken::SyncToken(const SyncToken& other) = default;
SyncToken& SyncToken::operator=(const SyncToken& other) = default;
std::string SyncToken::ToDebugString() const {
// At the level of the generic command buffer code, the command buffer ID is
// an arbitrary 64-bit number. For the debug output, print its upper and lower
// 32bit words separately. This ensures more readable output for IDs allocated
// by gpu/ipc code which uses these words for channel and route IDs, but it's
// still a lossless representation if the IDs don't match this convention.
uint64_t id = command_buffer_id().GetUnsafeValue();
uint32_t channel_or_high = 0xffffffff & id;
uint32_t route_or_low = id >> 32;
std::ostringstream stream;
stream << static_cast<int>(namespace_id()) << ":" << channel_or_high << ":"
<< route_or_low << ":" << release_count();
return stream.str();
}
std::vector<SyncToken> ReduceSyncTokens(base::span<const SyncToken> tokens) {
std::vector<SyncToken> reduced;
for (const SyncToken& next_token : tokens) {
auto itr =
base::ranges::find_if(reduced, [&next_token](const SyncToken& token) {
return next_token.namespace_id() == token.namespace_id() &&
next_token.command_buffer_id() == token.command_buffer_id();
});
if (itr == reduced.end()) {
reduced.push_back(next_token);
} else {
if (itr->release_count() < next_token.release_count()) {
*itr = next_token;
}
}
}
return reduced;
}
} // namespace gpu
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