-In short, just add a line to src/simix/simcalls.in and run the
-src/simix/simcalls.py script. It will guide you about how to implement
-your simcall. Please keep reading this section (only) if you want to
-understand how it goes.
-
-
-The workflow of a simcall is the following:
-
-- `<ret> simcall_<name>(<args>)`
- - `simcall_BODY_<name>(<args>)`
- - Initializes the simcall (store the arguments in position)
- - If maestro, executes the simcall directly (and return)
- - If not, call `SIMIX_process_yield` to give back the control to maestro
- - ========== KERNEL MODE ==========
- - `SIMIX_simcall_handle` large switch (on simcall) doing for each:
- - `simcall_HANDLER_<name>(simcall, <args>)` (the manual code handling the simcall)
- - If the simcall is not marked as "blocking" in its definition,
- call `SIMIX_simcall_answer(simcall)` that adds back the issuer
- process to the list of processes to run in the next scheduling round.
- It is thus the responsability of the blocking simcalls to call
- `SIMIX_simcall_answer(simcall)` themselves in their handler.
-
-Note that empty HANDLERs can be omitted. These functions usually do
-some parameter checking, or retrieve some information about the
-simcall issuer, but when there no need for such things, the handler
-can be omited. In that case, we directly call the function
-`simcall_<name>(<args>)`.
-
-To simplify the simcall creation, a python script generates most of
-the code and give helpers for the remaining stuff. That script reads
-the simcall definitions from src/simix/simcalls.in, checks that both
-`simcall_<name>()` and `simcall_HANDLER()` are defined somewhere, and
-generates the following files:
-
-- smx_popping_accessors.h:
- Helper functions to get and set simcall arguments and results
-- smx_popping_bodies.cpp:
- The BODY function of each simcall
-- smx_popping_enum.c:
- Definition of type `enum e_smx_simcall_t` (one value per existing simcall)
-- smx_popping_generated.cpp:
- Definitions of `simcall_names[]` (debug name of each simcall), and
- SIMIX_simcall_enter() that deals with the simcall from within the kernel
-
-The simcall.in file list all the simcalls in sections. A line starting by "##"
-define a new section which will be replace by a "ifdef" in the generated code.
+// We don't have anything to do, wait for the operation to complete and
+// get its value:
+try {
+ std:vector<char> data = result.get();
+ XBT_DEBUG("Finished reading file %s: length %zu", file, data.size());
+}
+// If the operation failed, .get() throws an exception:
+catch (std::runtime_error& e) {
+ XBT_ERROR("Could not read file %s", file);
+}
+~~~