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ldr: optimize memory usage for tracking system programs

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This commit is contained in:
Michael Scire 2020-03-08 16:54:32 -07:00
parent 6eee3f5fe7
commit 08d9de6907
1 changed files with 30 additions and 2 deletions
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28
stratosphere/loader/source/ldr_launch_record.cpp
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@ -22,16 +22,44 @@ namespace ams::ldr {
/* Global cache. */ /* Global cache. */
std::set<u64> g_launched_programs; std::set<u64> g_launched_programs;
constexpr size_t NumSystemProgramIds = ncm::SystemProgramId::End.value - ncm::SystemProgramId::Start.value + 1;
static_assert(util::IsPowerOfTwo(NumSystemProgramIds));
static_assert(util::IsAligned(NumSystemProgramIds, BITSIZEOF(u64)));
bool IsTrackableSystemProgramId(ncm::ProgramId program_id) {
return ncm::SystemProgramId::Start <= program_id && program_id <= ncm::SystemProgramId::End;
}
u64 g_system_launch_records[NumSystemProgramIds / BITSIZEOF(u64)];
void SetLaunchedSystemProgram(ncm::SystemProgramId program_id) {
const u64 val = program_id.value - ncm::SystemProgramId::Start.value;
g_system_launch_records[val / BITSIZEOF(u64)] |= (1ul << (val % BITSIZEOF(u64)));
}
bool HasLaunchedSystemProgram(ncm::SystemProgramId program_id) {
const u64 val = program_id.value - ncm::SystemProgramId::Start.value;
return (g_system_launch_records[val / BITSIZEOF(u64)] & (1ul << (val % BITSIZEOF(u64)))) != 0;
}
} }
/* Launch Record API. */ /* Launch Record API. */
bool HasLaunchedProgram(ncm::ProgramId program_id) { bool HasLaunchedProgram(ncm::ProgramId program_id) {
if (IsTrackableSystemProgramId(program_id)) {
return HasLaunchedSystemProgram(ncm::SystemProgramId{program_id.value});
} else {
return g_launched_programs.find(static_cast<u64>(program_id)) != g_launched_programs.end(); return g_launched_programs.find(static_cast<u64>(program_id)) != g_launched_programs.end();
} }
}
void SetLaunchedProgram(ncm::ProgramId program_id) { void SetLaunchedProgram(ncm::ProgramId program_id) {
if (IsTrackableSystemProgramId(program_id)) {
SetLaunchedSystemProgram(ncm::SystemProgramId{program_id.value});
} else {
g_launched_programs.insert(static_cast<u64>(program_id)); g_launched_programs.insert(static_cast<u64>(program_id));
} }
}
} }