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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111(************************************************************************)(* * The Rocq Prover / The Rocq Development Team *)(* v * Copyright INRIA, CNRS and contributors *)(* <O___,, * (see version control and CREDITS file for authors & dates) *)(* \VV/ **************************************************************)(* // * This file is distributed under the terms of the *)(* * GNU Lesser General Public License Version 2.1 *)(* * (see LICENSE file for the text of the license) *)(************************************************************************)
type thread_ic = in_channel
let prepare_in_channel_for_thread_friendly_io ic = ic
let thread_friendly_read_fd fd s ~off ~len = let rec loop () = try Unix.read fd s off len with Unix.Unix_error(Unix.EINTR,_,_) -> loop () in loop ()
let thread_friendly_read ic s ~off ~len = try let fd = Unix.descr_of_in_channel ic in thread_friendly_read_fd fd s ~off ~len with Unix.Unix_error _ -> 0
let really_read_fd fd s off len = let i = ref 0 in while !i < len do let off = off + !i in let len = len - !i in let r = thread_friendly_read_fd fd s ~off ~len in if r = 0 then raise End_of_file; i := !i + r done
let really_read_fd_2_oc fd oc len = let i = ref 0 in let size = 4096 in let s = Bytes.create size in while !i < len do let len = len - !i in let r = thread_friendly_read_fd fd s ~off:0 ~len:(min len size) in if r = 0 then raise End_of_file; i := !i + r; output oc s 0 r; done
let thread_friendly_really_read ic s ~off ~len = try let fd = Unix.descr_of_in_channel ic in really_read_fd fd s off len with Unix.Unix_error _ -> raise End_of_file
let thread_friendly_really_read_line ic = try let fd = Unix.descr_of_in_channel ic in let b = Buffer.create 1024 in let s = Bytes.make 1 '\000' in let endl = Bytes.of_string "\n" in while not (Bytes.equal s endl) do let n = thread_friendly_read_fd fd s ~off:0 ~len:1 in if n = 0 then raise End_of_file; if not (Bytes.equal s endl) then Buffer.add_bytes b s; done; Buffer.contents b with Unix.Unix_error _ -> raise End_of_file
let thread_friendly_input_value ic = try let fd = Unix.descr_of_in_channel ic in let header = Bytes.create Marshal.header_size in really_read_fd fd header 0 Marshal.header_size; let body_size = Marshal.data_size header 0 in let desired_size = body_size + Marshal.header_size in if desired_size <= Sys.max_string_length then begin let msg = Bytes.create desired_size in Bytes.blit header 0 msg 0 Marshal.header_size; really_read_fd fd msg Marshal.header_size body_size; Marshal.from_bytes msg 0 end else begin (* Workaround for 32 bit systems and data > 16M *) let name, oc = Filename.open_temp_file ~mode:[Open_binary] "coq" "marshal" in try output oc header 0 Marshal.header_size; really_read_fd_2_oc fd oc body_size; close_out oc; let ic = open_in_bin name in let data = Marshal.from_channel ic in close_in ic; Sys.remove name; data with e -> Sys.remove name; raise e end with Unix.Unix_error _ | Sys_error _ -> raise End_of_file
(* On the ocaml runtime used in some opam-for-windows version the * [Thread.sigmask] API raises Invalid_argument "not implemented", * hence we protect the call and turn the exception into a no-op *)let mask_sigalrm f x = begin try ignore(Thread.sigmask Unix.SIG_BLOCK [Sys.sigalrm]) with Invalid_argument _ -> () end; f x
let create f x = Thread.create (mask_sigalrm f) x
let with_lock = Memprof_coq.Mutex_aux.with_lock