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Cache result of SCIPgetSols #241

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Cache result of SCIPgetSols #241

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31a216c
solutions stored in cachde
matbesancon Aug 26, 2022
1ba8ef2
Update
odow May 18, 2025
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5 changes: 5 additions & 0 deletions src/MOI_wrapper.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@ mutable struct Optimizer <: MOI.AbstractOptimizer
Nothing,
Dict{String,Union{Nothing,MOI.ConstraintIndex}},
}
solution_storage::Vector{Ptr{SCIP_SOL}}

function Optimizer(; kwargs...)
o = new(
Expand All @@ -66,6 +67,7 @@ mutable struct Optimizer <: MOI.AbstractOptimizer
_kSCIP_SOLVE_STATUS_NOT_CALLED,
nothing,
nothing,
Ptr{SCIP_SOL}[],
)
# Set all parameters given as keyword arguments, replacing the
# delimiter, since "/" is used by all SCIP parameters, but is not
Expand Down Expand Up @@ -112,6 +114,7 @@ function MOI.empty!(o::Optimizer)
o.scip_solve_status = _kSCIP_SOLVE_STATUS_NOT_CALLED
o.name_to_variable = nothing
o.name_to_constraint_index = nothing
o.solution_storage = Ptr{SCIP_SOL}[]
return nothing
end

Expand Down Expand Up @@ -428,6 +431,8 @@ function MOI.optimize!(o::Optimizer)
finally
o.scip_solve_status = _kSCIP_SOLVE_STATUS_FINISHED
end
o.solution_storage =
unsafe_wrap(Vector{Ptr{SCIP_SOL}}, SCIPgetSols(o), SCIPgetNSols(o))
return nothing
end

Expand Down
18 changes: 6 additions & 12 deletions src/MOI_wrapper/results.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -81,15 +81,13 @@ end
function MOI.get(o::Optimizer, attr::MOI.ObjectiveValue)
assert_solved(o)
MOI.check_result_index_bounds(o, attr)
sols = unsafe_wrap(Array{Ptr{SCIP_SOL}}, SCIPgetSols(o), SCIPgetNSols(o))
return SCIPgetSolOrigObj(o, sols[attr.result_index])
return SCIPgetSolOrigObj(o, o.solution_storage[attr.result_index])
end

function MOI.get(o::Optimizer, attr::MOI.VariablePrimal, vi::MOI.VariableIndex)
assert_solved(o)
MOI.check_result_index_bounds(o, attr)
sols = unsafe_wrap(Array{Ptr{SCIP_SOL}}, SCIPgetSols(o), SCIPgetNSols(o))
return SCIPgetSolVal(o, sols[attr.result_index], var(o, vi))
return SCIPgetSolVal(o, o.solution_storage[attr.result_index], var(o, vi))
end

function MOI.get(
Expand All @@ -99,12 +97,8 @@ function MOI.get(
)
assert_solved(o)
MOI.check_result_index_bounds(o, attr)
sols = unsafe_wrap(Array{Ptr{SCIP_SOL}}, SCIPgetSols(o), SCIPgetNSols(o))
return SCIPgetSolVal(
o,
sols[attr.result_index],
var(o, MOI.VariableIndex(ci.value)),
)
x = MOI.VariableIndex(ci.value)
return SCIPgetSolVal(o, o.solution_storage[attr.result_index], var(o, x))
end

function MOI.get(
Expand All @@ -114,8 +108,8 @@ function MOI.get(
)
assert_solved(o)
MOI.check_result_index_bounds(o, attr)
sols = unsafe_wrap(Array{Ptr{SCIP_SOL}}, SCIPgetSols(o), SCIPgetNSols(o))
return SCIPgetActivityLinear(o, cons(o, ci), sols[attr.result_index])
sols = o.solution_storage[attr.result_index]
return SCIPgetActivityLinear(o, cons(o, ci), sols)
end

function MOI.get(o::Optimizer, ::MOI.ObjectiveBound)
Expand Down
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