libuv.jl
# This file is a part of Julia. License is MIT: https://julialang.org/license
# Core definitions for interacting with the libuv library from Julia
include(string(length(Core.ARGS)>=2?Core.ARGS[2]:"","uv_constants.jl")) # include($BUILDROOT/base/uv_constants.jl)
# convert UV handle data to julia object, checking for null
function uv_sizeof_handle(handle)
if !(UV_UNKNOWN_HANDLE < handle < UV_HANDLE_TYPE_MAX)
throw(DomainError())
end
ccall(:uv_handle_size,Csize_t,(Int32,),handle)
end
function uv_sizeof_req(req)
if !(UV_UNKNOWN_REQ < req < UV_REQ_TYPE_MAX)
throw(DomainError())
end
ccall(:uv_req_size,Csize_t,(Int32,),req)
end
for h in uv_handle_types
@eval const $(Symbol("_sizeof_",lowercase(string(h)))) = uv_sizeof_handle($h)
end
for r in uv_req_types
@eval const $(Symbol("_sizeof_",lowercase(string(r)))) = uv_sizeof_req($r)
end
uv_handle_data(handle) = ccall(:jl_uv_handle_data,Ptr{Void},(Ptr{Void},),handle)
uv_req_data(handle) = ccall(:jl_uv_req_data,Ptr{Void},(Ptr{Void},),handle)
uv_req_set_data(req,data) = ccall(:jl_uv_req_set_data,Void,(Ptr{Void},Any),req,data)
uv_req_set_data(req,data::Ptr{Void}) = ccall(:jl_uv_req_set_data,Void,(Ptr{Void},Ptr{Void}),req,data)
macro handle_as(hand, typ)
quote
data = uv_handle_data($(esc(hand)))
data == C_NULL && return
unsafe_pointer_to_objref(data)::($(esc(typ)))
end
end
associate_julia_struct(handle::Ptr{Void}, jlobj::ANY) =
ccall(:jl_uv_associate_julia_struct, Void, (Ptr{Void}, Any), handle, jlobj)
disassociate_julia_struct(uv) = disassociate_julia_struct(uv.handle)
disassociate_julia_struct(handle::Ptr{Void}) =
handle != C_NULL && ccall(:jl_uv_disassociate_julia_struct, Void, (Ptr{Void},), handle)
# A dict of all libuv handles that are being waited on somewhere in the system
# and should thus not be garbage collected
const uvhandles = ObjectIdDict()
preserve_handle(x) = uvhandles[x] = get(uvhandles,x,0)::Int+1
unpreserve_handle(x) = (v = uvhandles[x]::Int; v == 1 ? pop!(uvhandles,x) : (uvhandles[x] = v-1); nothing)
## Libuv error handling ##
mutable struct UVError <: Exception
prefix::AbstractString
code::Int32
UVError(p::AbstractString,code::Integer)=new(p,code)
end
struverror(err::Int32) = unsafe_string(ccall(:uv_strerror,Cstring,(Int32,),err))
struverror(err::UVError) = struverror(err.code)
uverrorname(err::Int32) = unsafe_string(ccall(:uv_err_name,Cstring,(Int32,),err))
uverrorname(err::UVError) = uverrorname(err.code)
uv_error(prefix::Symbol, c::Integer) = uv_error(string(prefix),c)
uv_error(prefix::AbstractString, c::Integer) = c < 0 ? throw(UVError(prefix,c)) : nothing
show(io::IO, e::UVError) = print(io, e.prefix*": "*struverror(e)*" ("*uverrorname(e)*")")
## event loop ##
eventloop() = uv_eventloop::Ptr{Void}
#mkNewEventLoop() = ccall(:jl_new_event_loop,Ptr{Void},()) # this would probably be fine, but is nowhere supported
function run_event_loop()
ccall(:jl_run_event_loop,Void,(Ptr{Void},),eventloop())
end
function process_events(block::Bool)
loop = eventloop()
if block
return ccall(:jl_run_once,Int32,(Ptr{Void},),loop)
else
return ccall(:jl_process_events,Int32,(Ptr{Void},),loop)
end
end
function reinit_stdio()
global uv_jl_alloc_buf = cfunction(uv_alloc_buf, Void, Tuple{Ptr{Void}, Csize_t, Ptr{Void}})
global uv_jl_readcb = cfunction(uv_readcb, Void, Tuple{Ptr{Void}, Cssize_t, Ptr{Void}})
global uv_jl_connectioncb = cfunction(uv_connectioncb, Void, Tuple{Ptr{Void}, Cint})
global uv_jl_connectcb = cfunction(uv_connectcb, Void, Tuple{Ptr{Void}, Cint})
global uv_jl_writecb_task = cfunction(uv_writecb_task, Void, Tuple{Ptr{Void}, Cint})
global uv_jl_getaddrinfocb = cfunction(uv_getaddrinfocb, Void, Tuple{Ptr{Void}, Cint, Ptr{Void}})
global uv_jl_recvcb = cfunction(uv_recvcb, Void, Tuple{Ptr{Void}, Cssize_t, Ptr{Void}, Ptr{Void}, Cuint})
global uv_jl_sendcb = cfunction(uv_sendcb, Void, Tuple{Ptr{Void}, Cint})
global uv_jl_return_spawn = cfunction(uv_return_spawn, Void, Tuple{Ptr{Void}, Int64, Int32})
global uv_jl_asynccb = cfunction(uv_asynccb, Void, Tuple{Ptr{Void}})
global uv_jl_timercb = cfunction(uv_timercb, Void, Tuple{Ptr{Void}})
global uv_eventloop = ccall(:jl_global_event_loop, Ptr{Void}, ())
global STDIN = init_stdio(ccall(:jl_stdin_stream, Ptr{Void}, ()))
global STDOUT = init_stdio(ccall(:jl_stdout_stream, Ptr{Void}, ()))
global STDERR = init_stdio(ccall(:jl_stderr_stream, Ptr{Void}, ()))
end
"""
STDIN
Global variable referring to the standard input stream.
"""
:STDIN
"""
STDOUT
Global variable referring to the standard out stream.
"""
:STDOUT
"""
STDERR
Global variable referring to the standard error stream.
"""
:STDERR