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### =========================================================================
### DoparParam objects
### -------------------------------------------------------------------------
### - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
### Constructor
###
.DoparParam_prototype <- .BiocParallelParam_prototype
.DoparParam <- setRefClass("DoparParam",
contains="BiocParallelParam",
fields=list(),
methods=list()
)
DoparParam <-
function(stop.on.error=TRUE, RNGseed = NULL)
{
if (!requireNamespace("foreach", quietly = TRUE))
stop("DoparParam() requires the 'foreach' package", call. = FALSE)
prototype <- .prototype_update(
.DoparParam_prototype,
stop.on.error=stop.on.error,
RNGseed=RNGseed
)
x <- do.call(.DoparParam, prototype)
## DoparParam is always up, so we need to initialize
## the seed stream here
.bpstart_set_rng_stream(x)
validObject(x)
x
}
setMethod("bpworkers", "DoparParam",
function(x)
{
if (bpisup(x))
foreach::getDoParWorkers()
else 0L
})
setMethod("bpisup", "DoparParam",
function(x)
{
isNamespaceLoaded("foreach") &&
foreach::getDoParRegistered() &&
(foreach::getDoParName() != "doSEQ")
})
### - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
### Manager
###
.DoparParamManager <- setClass("DoparParamManager",
contains="TaskManager"
)
## constructor
setMethod(
".manager", "DoparParam",
function(BPPARAM)
{
.DoparParamManager(
BPPARAM = BPPARAM,
tasks = new.env(parent = emptyenv())
)
})
setMethod(
".manager_send", "DoparParamManager",
function(manager, value, ...)
{
taskId <- length(manager$tasks) + 1L
if (taskId == 1L)
manager$const.value <- .task_const(value)
manager$tasks[[as.character(taskId)]] <- .task_dynamic(value)
})
setMethod(
".manager_recv", "DoparParamManager",
function(manager)
{
stopifnot(length(manager$tasks) > 0L)
tasks <- as.list(manager$tasks)
tasks <- tasks[order(names(tasks))]
const.value <- manager$const.value
`%dopar%` <- foreach::`%dopar%`
foreach <- foreach::foreach
tryCatch({
results <-
foreach(task = tasks)%dopar%{
task <- .task_remake(task, const.value)
if (task$type == "EXEC")
value <- .bpworker_EXEC(task)
else
value <- NULL
list(value = value)
}
}, error=function(e) {
stop(
"'DoparParam()' foreach() error occurred: ",
conditionMessage(e)
)
})
## cleanup the tasks
remove(list = ls(manager$tasks), envir = manager$tasks)
manager$const.value <- NULL
results
})
setMethod(
".manager_send_all", "DoparParamManager",
function(manager, value)
{
nworkers <- bpworkers(manager$BPPARAM)
for (i in seq_len(nworkers)) {
.manager_send(manager, value)
}
})
setMethod(
".manager_recv_all", "DoparParamManager",
function(manager) .manager_recv(manager)
)
setMethod(
".manager_capacity", "DoparParamManager",
function(manager)
{
.Machine$integer.max
})
### - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
### Methods - evaluation
###
setMethod("bpiterate", c("ANY", "ANY", "DoparParam"),
function(ITER, FUN, ..., BPREDO = list(),
BPPARAM=bpparam(), BPOPTIONS=bpoptions())
{
stop("'bpiterate' not supported for DoparParam")
})
|
