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Code Issues Releases Wiki Activity

ircd::ctx: Add some noexcept; minor comment justification.

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This commit is contained in:
Jason Volk 2020-05-18 19:13:53 -07:00
parent 00fe4baa2a
commit 3c96120e72
2 changed files with 30 additions and 27 deletions
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54
include/ircd/ctx/ctx.h
View file

@ -39,39 +39,39 @@ namespace ircd::ctx
IRCD_EXCEPTION(ircd::error, error) IRCD_EXCEPTION(ircd::error, error)
IRCD_EXCEPTION(error, interrupted) IRCD_EXCEPTION(error, interrupted)
IRCD_EXCEPTION(error, timeout) IRCD_EXCEPTION(error, timeout)
struct terminated {}; // Special exception struct terminated {}; // Special exception
IRCD_OVERLOAD(threadsafe) IRCD_OVERLOAD(threadsafe)
bool is_main_thread() noexcept; bool is_main_thread() noexcept;
void assert_main_thread(); void assert_main_thread();
const uint64_t &id(const ctx &) noexcept; // Unique ID for context const uint64_t &id(const ctx &) noexcept; // Unique ID for context
string_view name(const ctx &) noexcept; // User's optional label for context string_view name(const ctx &) noexcept; // User's optional label for context
const uint32_t &flags(const ctx &) noexcept; // Direct flags access const uint32_t &flags(const ctx &) noexcept; // Direct flags access
const int32_t &notes(const ctx &) noexcept; // Peeks at internal semaphore count const int32_t &notes(const ctx &) noexcept; // Peeks at internal semaphore count
const uint64_t &epoch(const ctx &) noexcept; // Context switching counter const uint64_t &epoch(const ctx &) noexcept; // Context switching counter
const ulong &cycles(const ctx &) noexcept; // Accumulated tsc (not counting cur slice) const ulong &cycles(const ctx &) noexcept; // Accumulated tsc (not counting cur slice)
const int8_t &ionice(const ctx &) noexcept; // IO priority nice-value const int8_t &ionice(const ctx &) noexcept; // IO priority nice-value
const int8_t &nice(const ctx &) noexcept; // Scheduling priority nice-value const int8_t &nice(const ctx &) noexcept; // Scheduling priority nice-value
bool interruptible(const ctx &) noexcept; // Context can throw at interruption point bool interruptible(const ctx &) noexcept; // Context can throw at interruption point
bool interruption(const ctx &) noexcept; // Context was marked for interruption bool interruption(const ctx &) noexcept; // Context was marked for interruption
bool termination(const ctx &) noexcept; // Context was marked for termination bool termination(const ctx &) noexcept; // Context was marked for termination
bool finished(const ctx &) noexcept; // Context function returned (or exception). bool finished(const ctx &) noexcept; // Context function returned (or exception).
bool started(const ctx &) noexcept; // Context was ever entered. bool started(const ctx &) noexcept; // Context was ever entered.
bool running(const ctx &) noexcept; // Context is the currently running ctx. bool running(const ctx &) noexcept; // Context is the currently running ctx.
bool waiting(const ctx &) noexcept; // started() && !finished() && !running() bool waiting(const ctx &) noexcept; // started() && !finished() && !running()
bool queued(const ctx &) noexcept; // !running() && notes() > 0 bool queued(const ctx &) noexcept; // !running() && notes() > 0
uint32_t &flags(ctx &) noexcept; // Direct flags access uint32_t &flags(ctx &) noexcept; // Direct flags access
int8_t ionice(ctx &, const int8_t &); // IO priority nice-value int8_t ionice(ctx &, const int8_t &) noexcept; // IO priority nice-value
int8_t nice(ctx &, const int8_t &); // Scheduling priority nice-value int8_t nice(ctx &, const int8_t &) noexcept; // Scheduling priority nice-value
void interruptible(ctx &, const bool &); // False for interrupt suppression. void interruptible(ctx &, const bool &) noexcept; // False for interrupt suppression.
void interrupt(ctx &); // Interrupt the context. void interrupt(ctx &); // Interrupt the context.
void terminate(ctx &); // Interrupt for termination. void terminate(ctx &); // Interrupt for termination.
void signal(ctx &, std::function<void ()>); // Post function to context strand void signal(ctx &, std::function<void ()>); // Post function to context strand
void notify(ctx &, threadsafe_t); // Notify context with threadsafety. void notify(ctx &, threadsafe_t); // Notify context with threadsafety.
bool notify(ctx &) noexcept; // Queue a context switch to arg bool notify(ctx &) noexcept; // Queue a context switch to arg
void yield(ctx &); // Direct context switch to arg void yield(ctx &); // Direct context switch to arg
bool for_each(const std::function<bool (ctx &)> &); bool for_each(const std::function<bool (ctx &)> &);
const uint64_t &epoch() noexcept; const uint64_t &epoch() noexcept;

3
ircd/ctx.cc
View file

@ -514,6 +514,7 @@ ircd::ctx::interrupt(ctx &ctx)
void void
ircd::ctx::interruptible(ctx &ctx, ircd::ctx::interruptible(ctx &ctx,
const bool &b) const bool &b)
noexcept
{ {
if(b) if(b)
ctx.flags &= ~context::NOINTERRUPT; ctx.flags &= ~context::NOINTERRUPT;
@ -524,6 +525,7 @@ ircd::ctx::interruptible(ctx &ctx,
int8_t int8_t
ircd::ctx::nice(ctx &ctx, ircd::ctx::nice(ctx &ctx,
const int8_t &val) const int8_t &val)
noexcept
{ {
ctx.nice = val; ctx.nice = val;
return ctx.nice; return ctx.nice;
@ -532,6 +534,7 @@ ircd::ctx::nice(ctx &ctx,
int8_t int8_t
ircd::ctx::ionice(ctx &ctx, ircd::ctx::ionice(ctx &ctx,
const int8_t &val) const int8_t &val)
noexcept
{ {
ctx.ionice = val; ctx.ionice = val;
return ctx.ionice; return ctx.ionice;