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require_relative 'spec_helper'
require_relative '../../core/thread/shared/wakeup'
load_extension("thread")
class Thread
def self.capi_thread_specs=(t)
@@capi_thread_specs = t
end
def call_capi_rb_thread_wakeup
@@capi_thread_specs.rb_thread_wakeup(self)
end
end
describe "C-API Thread function" do
before :each do
@t = CApiThreadSpecs.new
ScratchPad.clear
Thread.capi_thread_specs = @t
end
describe "rb_thread_wait_for" do
it "sleeps the current thread for the give amount of time" do
start = Time.now
@t.rb_thread_wait_for(0, 100_000)
(Time.now - start).should be_close(0.1, TIME_TOLERANCE)
end
end
describe "rb_thread_alone" do
it "returns true if there is only one thread" do
pred = Thread.list.size == 1
@t.rb_thread_alone.should == pred
end
end
describe "rb_thread_current" do
it "equals Thread.current" do
@t.rb_thread_current.should == Thread.current
end
end
describe "rb_thread_local_aref" do
it "returns the value of a thread-local variable" do
thr = Thread.current
sym = :thread_capi_specs_aref
thr[sym] = 1
@t.rb_thread_local_aref(thr, sym).should == 1
end
it "returns nil if the value has not been set" do
@t.rb_thread_local_aref(Thread.current, :thread_capi_specs_undefined).should be_nil
end
end
describe "rb_thread_local_aset" do
it "sets the value of a thread-local variable" do
thr = Thread.current
sym = :thread_capi_specs_aset
@t.rb_thread_local_aset(thr, sym, 2).should == 2
thr[sym].should == 2
end
end
describe "rb_thread_wakeup" do
it_behaves_like :thread_wakeup, :call_capi_rb_thread_wakeup
end
describe "rb_thread_create" do
it "creates a new thread" do
obj = Object.new
proc = -> x { ScratchPad.record x }
thr = @t.rb_thread_create(proc, obj)
thr.should be_kind_of(Thread)
thr.join
ScratchPad.recorded.should == obj
end
it "handles throwing an exception in the thread" do
prc = -> x {
Thread.current.report_on_exception = false
raise "my error"
}
thr = @t.rb_thread_create(prc, nil)
thr.should be_kind_of(Thread)
-> {
thr.join
}.should raise_error(RuntimeError, "my error")
end
it "sets the thread's group" do
thr = @t.rb_thread_create(-> x { }, nil)
begin
thread_group = thr.group
thread_group.should be_an_instance_of(ThreadGroup)
ensure
thr.join
end
end
end
describe "rb_thread_call_without_gvl" do
it "runs a C function with the global lock unlocked and can be woken by Thread#wakeup" do
thr = Thread.new do
@t.rb_thread_call_without_gvl
end
# Wait until it's blocking...
Thread.pass until thr.stop?
# The thread status is set to sleep by rb_thread_call_without_gvl(),
# but the thread might not be in the blocking read(2) yet, so wait a bit.
sleep 0.1
# Wake it up, causing the unblock function to be run.
thr.wakeup
# Make sure it stopped and we got a proper value
thr.value.should be_true
end
platform_is_not :windows do
it "runs a C function with the global lock unlocked and can be woken by a signal" do
# Ruby signal handlers run on the main thread, so we need to reverse roles here and have a thread interrupt us
thr = Thread.current
thr.should == Thread.main
going_to_block = false
interrupter = Thread.new do
# Wait until it's blocking...
Thread.pass until going_to_block and thr.stop?
# The thread status is set to sleep by rb_thread_call_without_gvl(),
# but the thread might not be in the blocking read(2) yet, so wait a bit.
sleep 0.1
# Wake it up by sending a signal
done = false
prev_handler = Signal.trap(:HUP) { done = true }
begin
Process.kill :HUP, Process.pid
sleep 0.001 until done
ensure
Signal.trap(:HUP, prev_handler)
end
end
going_to_block = true
# Make sure it stopped and we got a proper value
@t.rb_thread_call_without_gvl.should be_true
interrupter.join
end
end
platform_is_not :mingw do
it "runs a C function with the global lock unlocked and unlocks IO with the generic RUBY_UBF_IO" do
thr = Thread.new do
@t.rb_thread_call_without_gvl_with_ubf_io
end
# Wait until it's blocking...
Thread.pass until thr.stop?
# The thread status is set to sleep by rb_thread_call_without_gvl(),
# but the thread might not be in the blocking read(2) yet, so wait a bit.
sleep 0.1
# Wake it up, causing the unblock function to be run.
thr.wakeup
# Make sure it stopped and we got a proper value
thr.value.should be_true
end
end
end
end
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