Priority as number (#90)

---------

Co-authored-by: Stefan Krastanov <github.acc@krastanov.org>
Co-authored-by: Stefan Krastanov <stefan@krastanov.org>

Author: hdavid16

docs/src/api.md

@@ -6,6 +6,6 @@ Private = false
 ```
 
 ```@docs
-unlock(res::Container; priority::Int=0)
+unlock(res::Resource; priority::Number=0)
 take!(sto::Store, filter::Function=get_any_item; priority::Int=0)
 ```

src/base.jl

@@ -63,7 +63,7 @@ function remove_callback(cb::Function, ev::AbstractEvent)
   i != 0 && deleteat!(ev.bev.callbacks, i)
 end
 
-function schedule(ev::AbstractEvent, delay::Number=zero(Float64); priority::Int=0, value::Any=nothing)
+function schedule(ev::AbstractEvent, delay::Number=0; priority::Number=0, value::Any=nothing)
   state(ev) === processed && throw(EventProcessed(ev))
   env = environment(ev)
   bev = ev.bev

src/deprecated.jl

@@ -1,4 +1,4 @@
-Base.@deprecate put(args...) put!(args...)
+Base.@deprecate put(args...; kwargs...) put!(args...; kwargs...)
 #Base.@deprecate request(args...; kwargs...) lock(args...; kwargs...) # Not the same: `request` needs to be yielded, while `lock` yields itself
 #Base.@deprecate tryrequest(args...; kwargs...) trylock(args...; kwargs...) # Not the same: `request` needs to be yielded, while `lock` yields itself
 Base.@deprecate release(args...; kwargs...) unlock(args...; kwargs...)

src/events.jl

@@ -5,12 +5,12 @@ struct Event <: AbstractEvent
   end
 end
 
-function succeed(ev::Event; priority::Int=0, value::Any=nothing) :: Event
+function succeed(ev::Event; priority::Number=0, value::Any=nothing) :: Event
   state(ev) !== idle && throw(EventNotIdle(ev))
   schedule(ev; priority=priority, value=value)
 end
 
-function fail(ev::Event, exc::Exception; priority::Int=0) :: Event
+function fail(ev::Event, exc::Exception; priority::Number=0) :: Event
   succeed(ev; priority=priority, value=exc)
 end
 
@@ -21,10 +21,10 @@ struct Timeout <: AbstractEvent
   end
 end
 
-function timeout(env::Environment, delay::Number=0; priority::Int=0, value::Any=nothing)
+function timeout(env::Environment, delay::Number=0; priority::Number=0, value::Any=nothing)
   schedule(Timeout(env), delay; priority=priority, value=value)
 end
 
-function run(env::Environment, until::Number=typemax(Float64))
+function run(env::Environment, until::Number=Inf)
   run(env, timeout(env, until-now(env)))
 end

src/operators.jl

@@ -32,7 +32,7 @@ function check(ev::AbstractEvent, op::Operator, event_state_values::Dict{Abstrac
     end
   elseif state(op) === scheduled
     if isa(val, Exception)
-      schedule(op; priority=typemax(Int), value=val)
+      schedule(op; priority=Inf, value=val)
     else
       event_state_values[ev] = StateValue(state(ev), val)
     end

src/processes.jl

@@ -57,9 +57,9 @@ end
 function interrupt(proc::Process, cause::Any=nothing)
   env = environment(proc)
   if proc.fsmi._state !== 0xff
-    proc.target isa Initialize && schedule(proc.target; priority=typemax(Int))
-    target = schedule(Interrupt(env); priority=typemax(Int), value=InterruptException(active_process(env), cause))
+    proc.target isa Initialize && schedule(proc.target; priority=Inf)
+    target = schedule(Interrupt(env); priority=Inf, value=InterruptException(active_process(env), cause))
     @callback execute_interrupt(target, proc)
   end
-  timeout(env; priority=typemax(Int))
+  timeout(env; priority=Inf)
 end

src/resources/containers.jl

@@ -1,15 +1,15 @@
-struct ContainerKey{N<:Real} <: ResourceKey
-  priority :: Int
+struct ContainerKey{N<:Real, T<:Number} <: ResourceKey
   id :: UInt
   amount :: N
+  priority :: T
 end
 
 """
-    Container{N}(env::Environment, capacity::N=one(N); level::N=zero(N))
+    Container{N<:Real, T<:Number}(env::Environment, capacity::N=one(N); level::N=zero(N))
 
 A "Container" resource object, storing up to `capacity` units of a resource (of type `N`).
 
-There is a `Resource` alias for `Container{Int}`.
+There is a `Resource` alias for `Container{Int, Int}`.
 
 `Resource()` with default capacity of `1` is very similar to a typical lock.
 The [`request`](@ref) and [`unlock`](@ref) functions are a convenient way to interact with such a "lock",
@@ -19,27 +19,31 @@ See [`Store`](@ref) for a more channel-like resource.
 
 Think of `Resource` and `Container` as locks and of `Store` as channels. They block only if empty (on taking) or full (on storing).
 """
-mutable struct Container{N<:Real} <: AbstractResource
+mutable struct Container{N<:Real, T<:Number} <: AbstractResource
   env :: Environment
   capacity :: N
   level :: N
   seid :: UInt
-  put_queue :: DataStructures.PriorityQueue{Put, ContainerKey{N}}
-  get_queue :: DataStructures.PriorityQueue{Get, ContainerKey{N}}
-  function Container{N}(env::Environment, capacity::N=one(N); level::N=zero(N)) where {N<:Real}
-    new(env, capacity, level, zero(UInt), DataStructures.PriorityQueue{Put, ContainerKey{N}}(), DataStructures.PriorityQueue{Get, ContainerKey{N}}())
+  put_queue :: DataStructures.PriorityQueue{Put, ContainerKey{N, T}}
+  get_queue :: DataStructures.PriorityQueue{Get, ContainerKey{N, T}}
+  function Container{N, T}(env::Environment, capacity::N=one(N); level=zero(N)) where {N<:Real, T<:Number}
+    new(env, capacity, N(level), zero(UInt), DataStructures.PriorityQueue{Put, ContainerKey{N, T}}(), DataStructures.PriorityQueue{Get, ContainerKey{N, T}}())
   end
 end
 
-function Container(env::Environment, capacity::N=one(N); level::N=zero(N)) where {N<:Real}
-  Container{N}(env, capacity, level=level)
+function Container(env::Environment, capacity::N=one(N); level=zero(N)) where {N<:Real}
+  Container{N, Int}(env, capacity; level=N(level))
 end
 
-const Resource = Container{Int}
+function Container{T}(env::Environment, capacity::N=one(N); level=zero(N)) where {N<:Real, T<:Number}
+  Container{N, T}(env, capacity; level=N(level))
+end
+
+const Resource = Container{Int, Int}
 
-function put!(con::Container{N}, amount::N; priority::Int=0) where N<:Real
+function put!(con::Container{N, T}, amount::N; priority=zero(T)) where {N<:Real, T<:Number}
   put_ev = Put(con.env)
-  con.put_queue[put_ev] = ContainerKey(priority, con.seid+=one(UInt), amount)
+  con.put_queue[put_ev] = ContainerKey{N,T}(con.seid+=one(UInt), amount, T(priority))
   @callback trigger_get(put_ev, con)
   trigger_put(put_ev, con)
   put_ev
@@ -52,7 +56,7 @@ Locks the Container (or Resources) and return the lock event.
 If the capacity of the Container is greater than 1,
 multiple requests can be made before blocking occurs.
 """
-request(res::Container; priority::Int=0) = put!(res, 1; priority=priority)
+request(res::Resource; priority=0) = put!(res, 1; priority)
 
 """
     tryrequest(res::Container)
@@ -76,14 +80,14 @@ julia> tryrequest(res)
 false
 ```
 """
-function tryrequest(res::Container; priority::Int=0)
+function tryrequest(res::Container; priority=0)
     islocked(res) && return false # TODO check priority
     request(res; priority)
 end
 
-function get(con::Container{N}, amount::N; priority::Int=0) where N<:Real
+function get(con::Container{N, T}, amount::N; priority=zero(T)) where {N<:Real, T<:Number}
   get_ev = Get(con.env)
-  con.get_queue[get_ev] = ContainerKey(priority, con.seid+=one(UInt), amount)
+  con.get_queue[get_ev] = ContainerKey(con.seid+=one(UInt), amount, T(priority))
   @callback trigger_put(get_ev, con)
   trigger_get(get_ev, con)
   get_ev
@@ -94,16 +98,16 @@ end
 
 Unlocks the Container and return the unlock event.
 """
-unlock(res::Container; priority::Int=0) = get(res, 1; priority=priority)
+unlock(res::Resource; priority::Number=0) = get(res, 1; priority=priority)
 
-function do_put(con::Container{N}, put_ev::Put, key::ContainerKey{N}) where N<:Real
+function do_put(con::Container{N, T}, put_ev::Put, key::ContainerKey{N, T}) where {N<:Real, T<:Number}
   con.level + key.amount > con.capacity && return false
   schedule(put_ev)
   con.level += key.amount
   true
 end
 
-function do_get(con::Container{N}, get_ev::Get, key::ContainerKey{N}) where N<:Real
+function do_get(con::Container{N, T}, get_ev::Get, key::ContainerKey{N, T}) where {N<:Real, T<:Number}
   con.level - key.amount < zero(N) && return false
   schedule(get_ev)
   con.level -= key.amount

src/resources/stores.jl

@@ -1,63 +1,66 @@
-struct StorePutKey{T} <: ResourceKey
-  priority :: Int
+struct StorePutKey{N, T<:Number} <: ResourceKey
   id :: UInt
-  item :: T
-  StorePutKey{T}(priority, id, item) where T = new(priority, id, item)
+  item :: N
+  priority :: T
 end
 
-struct StoreGetKey <: ResourceKey
-  priority :: Int
+struct StoreGetKey{T<:Number} <: ResourceKey
   id :: UInt
   filter :: Function
+  priority :: T
 end
 
 """
-    Store{T}(env::Environment; capacity::UInt=typemax(UInt))
+    Store{N, T<:Number}(env::Environment; capacity::UInt=typemax(UInt))
 
-A store is a resource that can hold a number of items of type `T`. It is similar to a `Base.Channel` with a finite capacity ([`put!`](@ref) blocks after reaching capacity).
+A store is a resource that can hold a number of items of type `N`. It is similar to a `Base.Channel` with a finite capacity ([`put!`](@ref) blocks after reaching capacity).
 The [`put!`](@ref) and [`take!`](@ref) functions are a convenient way to interact with such a "channel" in a way mostly compatible with other discrete event and concurrency frameworks.
 
 See [`Container`](@ref) for a more lock-like resource.
 
 Think of `Resource` and `Container` as locks and of `Store` as channels. They block only if empty (on taking) or full (on storing).
 """
-mutable struct Store{T} <: AbstractResource
+mutable struct Store{N, T<:Number} <: AbstractResource
   env :: Environment
   capacity :: UInt
   load :: UInt
-  items :: Dict{T, UInt}
+  items :: Dict{N, UInt}
   seid :: UInt
-  put_queue :: DataStructures.PriorityQueue{Put, StorePutKey{T}}
-  get_queue :: DataStructures.PriorityQueue{Get, StoreGetKey}
-  function Store{T}(env::Environment; capacity=typemax(UInt)) where {T}
-    new(env, UInt(capacity), zero(UInt), Dict{T, UInt}(), zero(UInt), DataStructures.PriorityQueue{Put, StorePutKey{T}}(), DataStructures.PriorityQueue{Get, StoreGetKey}())
+  put_queue :: DataStructures.PriorityQueue{Put, StorePutKey{N, T}}
+  get_queue :: DataStructures.PriorityQueue{Get, StoreGetKey{T}}
+  function Store{N, T}(env::Environment; capacity=typemax(UInt)) where {N, T<:Number}
+    new(env, UInt(capacity), zero(UInt), Dict{N, UInt}(), zero(UInt), DataStructures.PriorityQueue{Put, StorePutKey{N, T}}(), DataStructures.PriorityQueue{Get, StoreGetKey{T}}())
   end
 end
 
+function Store{N}(env::Environment; capacity=typemax(UInt)) where {N}
+  Store{N, Int}(env; capacity=UInt(capacity))
+end    
+    
 """
     put!(sto::Store, item::T)
 
 Put an item into the store. Returns the put event, blocking if the store is full.
 """
-function put!(sto::Store{T}, item::T; priority::Int=0) where T
+function put!(sto::Store{N, T}, item::N; priority=zero(T)) where {N, T<:Number}
   put_ev = Put(sto.env)
-  sto.put_queue[put_ev] = StorePutKey{T}(priority, sto.seid+=one(UInt), item)
+  sto.put_queue[put_ev] = StorePutKey{N, T}(sto.seid+=one(UInt), item, T(priority))
   @callback trigger_get(put_ev, sto)
   trigger_put(put_ev, sto)
   put_ev
 end
 
-get_any_item(::T) where T = true
+get_any_item(::N) where N = true
 
-function get(sto::Store{T}, filter::Function=get_any_item; priority::Int=0) where T
+function get(sto::Store{N, T}, filter::Function=get_any_item; priority=zero(T)) where {N, T<:Number}
   get_ev = Get(sto.env)
-  sto.get_queue[get_ev] = StoreGetKey(priority, sto.seid+=one(UInt), filter)
+  sto.get_queue[get_ev] = StoreGetKey(sto.seid+=one(UInt), filter, T(priority))
   @callback trigger_put(get_ev, sto)
   trigger_get(get_ev, sto)
   get_ev
 end
 
-function do_put(sto::Store{T}, put_ev::Put, key::StorePutKey{T}) where {T}
+function do_put(sto::Store{N, T}, put_ev::Put, key::StorePutKey{N, T}) where {N, T<:Number}
   if sto.load < sto.capacity
     sto.load += one(UInt)
     sto.items[key.item] = get(sto.items, key.item, zero(UInt)) + one(UInt)
@@ -66,7 +69,7 @@ function do_put(sto::Store{T}, put_ev::Put, key::StorePutKey{T}) where {T}
   false
 end
 
-function do_get(sto::Store{T}, get_ev::Get, key::StoreGetKey) where {T}
+function do_get(sto::Store{N, T}, get_ev::Get, key::StoreGetKey{T}) where {N, T<:Number}
   for (item, number) in sto.items
     if key.filter(item)
       sto.load -= one(UInt)
@@ -126,4 +129,4 @@ tryrequest(::Store) = error("There is no well defined way to \"request\" a Store
 
 An alias for `get(::Store)` for easier interoperability with the `Base.Channel` interface. Blocks if the store is empty.
 """
-take!(sto::Store, filter::Function=get_any_item; priority::Int=0) = get(sto, filter; priority)
+take!(sto::Store, filter::Function=get_any_item; priority=0) = get(sto, filter; priority)

src/simulations.jl

@@ -8,9 +8,9 @@ end
 
 struct EmptySchedule <: Exception end
 
-struct EventKey
+struct EventKey{N<:Number}
   time :: Float64
-  priority :: Int
+  priority :: N
   id :: UInt
 end
 

src/utils/time.jl

@@ -6,7 +6,7 @@ function run(env::Environment, until::DateTime)
   run(env, Dates.datetime2epochms(until))
 end
 
-function timeout(env::Environment, delay::Period; priority::Int=0, value::Any=nothing)
+function timeout(env::Environment, delay::Period; priority::Number=0, value::Any=nothing)
   time = now(env)
   del = Dates.datetime2epochms(Dates.epochms2datetime(time)+delay)-time
   timeout(env, del; priority=priority, value=value)