With Daemons

Evaluate an expression using a specific compute profile.

Usage

with_daemons(.compute, expr)

local_daemons(.compute, frame = parent.frame())

Arguments

.compute

character value for the compute profile to use (each has its own independent set of daemons), or NULL to use the 'default' profile.

expr

an expression to evaluate.

frame

the frame (environment) to which the daemons compute profile is scoped.

Value

For with_daemons: the return value of expr.
For local_daemons: invisible NULL.

Details

Will error if the specified compute profile is not yet set up.

Examples

if (FALSE) { # interactive()
daemons(1, dispatcher = FALSE, .compute = "cpu")
daemons(1, dispatcher = FALSE, .compute = "gpu")

with_daemons("cpu", {
  s1 <- status()
  m1 <- mirai(Sys.getpid())
})

with_daemons("gpu", {
  s2 <- status()
  m2 <- mirai(Sys.getpid())
  m3 <- mirai(Sys.getpid(), .compute = "cpu")
  local_daemons("cpu")
  m4 <- mirai(Sys.getpid())
})

s1$daemons
m1[]

s2$daemons
m2[] # different to m1

m3[] # same as m1
m4[] # same as m1

with_daemons("cpu", daemons(0))
with_daemons("gpu", daemons(0))
}