X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d40ca2371c36fc6eeed4b51fef896c355c8e9ff8..b99d3a6127ec8f300b95e9bc3a90085814a19539:/README.coding diff --git a/README.coding b/README.coding index ec8290882a..c2fd8fbfbe 100644 --- a/README.coding +++ b/README.coding @@ -3,31 +3,6 @@ ** ****************************************************** -There is at least 5 sub-projects in the tree: - - - XBT: eXtended Bundle of Tools (low-level toolbox: logging, datatypes). - - SURF: a SimUlation aRtiFact. This is the simulation kernel. - - MSG: originally MetaSimGrid, MSG is a simple distributed application - simulator. - - SMPI: Simulated MPI, to run MPI application using emulation technics; - - MC: model-checker; - - SIMIX: basix interface for simulated processes. This layer defines simcalls - (simulation calls) exposed to the simulated processes by the SIMIX "kernel". - This interface is used to implement the MSG, SMPI layers. - - SIMDAG; - -They are all in the same tree because they are complementary tools and -having all of them in the same package makes the installation easier -for end-users. Moreover, it enables to share the compilation chain and -eases the development. - -The tree is not split on projects, but on file finality: - include/ -> all *public* headers - include/xbt/*.h -> one file per module - - src/include -> another location for protected headers. Used by SURF, and - other should be converted, since this is the Right Thing. - examples/ -> Supposed to be copy/pastable by the user, so keep it clear and avoid any kind of trick. In particular, do only include the public headers here. @@ -39,28 +14,41 @@ The tree is not split on projects, but on file finality: should leverage our tesh(1) utility. ** -** Indentation standard +** NEW type naming standard in SimGrid4 ** ***************************************************** -Most files use the Kernighan & Ritchie coding style with 2 spaces of -indentation. The indent program can help you to stick to it: - -indent -kr -l80 -nut -i2 -lps -npcs -br -brs -ce -cdw -bbo -npsl - -The script ./tools/indent runs indent with the appropriate options. - -FIXME: this list of arguments is still to be discussed, maybe +SimGrid4 will follow the these rules: + + - filenames are unique in the whole project + (because of a bug in Sonar coverage computation) + C++ + - fields, methods and variables are in snake_case() + - Classes and Enum names are in UpperCamelCase + - Enum values are in UPPER_SNAKE_CASE (as constants) + - public filenames: api_Class.cpp and api/Class.hpp. + - Example: src/s4u/s4u_ConditionVariable.cpp and + include/simgrid/s4u/ConditionVariable.hpp + - If you prefer api_class.cpp, that's OK, too. Breath and relax. + Example: src/s4u/s4u_actor.cpp and include/simgrid/s4u/Actor.hpp + - internal/kernel filenames: Class.cpp and Class.hpp + - Example: src/kernel/activity/Activity.cpp + include/simgrid/activity/Activity.hpp + C + - variables and functions are in snake_case() + - typedefs do not hide the pointers, ie * must be explicit + char * sg_host_get_name(sg_host_t * host); + + +This is different from the old convention (described below), that +should not be used in S4U and its bindings, nor in the kernel. ** -** Type naming standard +** OLD Type naming standard in SimGrid3 ** ***************************************************** -It may sound strange, but the type naming convention was source of intense -discussion between da SimGrid posse members. The convention we came to may not -be the best solution, but it has the merit to exist and leave everyone work. -So please stick to it. +SimGrid3 legacy interfaces (ie, MSG and SimDag) are following these rules: - ???_t is a valid type (built with typedef) - s_toto_t is a structure (access to fields with .) @@ -83,36 +71,6 @@ is private. If you see any part of the code not following this convention, this is a bug. Please report it (or fix it yourself if you can). -** -** Random bits about coding standards and portability -** -***************************************************** - -MALLOC - Don't use it, or you'll have to check the result (and do some dirty stuff - on AIX). Use xbt_malloc (or even better, xbt_new) instead. - -SIZE_T (FIXME: obsolete?) - If possible, avoid size_t and use unsigned long instead. If not, - #include in all files manipulating size_t - do cast it to unsigned long before printing (and use %lu), - or use %zu. - -INTEGERS - Please avoid to use long ints. This is the source of many compatibility - problems between 32 bits and 64 bits archs. Either use plain ints (generally - 32 bits wide) or long long ints (64 bits wide, at least). At last resort - consider using integer types defined in C99 by . - -PRINTF pointer difference (FIXME: advertise %td instead?) - printf ("diff = %ld\n", (long) (pointer2 - pointer1)); - -INLINE functions - The definition of a inline function must be visible when it is used. - As such, an inline function should be defined (an not only declared) - in header file (.h) with attributes 'static XBT_INLINE'. It should - not be defined in source file (.c). - ** ** Commenting the source: doxygen ** @@ -135,78 +93,10 @@ The documentation of each function must be in the C file were it lives. Any public element (function, type and macro) must have a @brief part. -** -** XBT virtualization mechanism (FIXME: this section is deprecated) -** -**************************************************** - -There is some functionalities that we want to virtualize in XBT. We -want xbt_time to give the simulated clock when running on top of the -simulator, and the host clock when running on a real system. This -could be placed in GRAS (and was, historically), but there is some -reason to lower it down to XBT. - -Here is the used naming scheme: - - - xbt__(): functions working both in SG and RL - - xbt_os__(): RL functions usable even in simulator - - That way, in libsimgrid, we still can use native functions if we - want to. It may for example be useful to get the real time when - implementing the simulator. Think of the SIGINT handler, which - wants to see if the user pressed the key twice in a 5 seconds - interval. This is of little use to check the simulated time here. - -Here is the file layout: - - - xbt_rl_.c: native implementation (xbt__()). - Simply call the corresponding xbt_os__. - Part only of libgras.so - - - xbt_sg_.c: SIMIX implementation xbt__()). - Simply call the corresponding SIMIX implementation. - Part only of libsimgrid.so - - - xbt_os_.c: body of the functions implementing natively the - stuff (xbt_os__()). - Part of both libgras.so and libsimgrid.so - -Since there is almost nothing in xbt_rl_module.c and xbt_sg_module.c, -it'd be better to use symbol aliasing here (to declare in the object -code that the same function have two names), but I'm still -investigating the portability of the thing to windows. - * * SimGrid Hacker Survival Guide (FIXME: should be betterly placed) ******************************** - -* Before pushing any change, don't forget to check if the compilation - passes with compiler optimizations and warnings turned on: - cmake -Denable_compile_optimizations=ON \ - -Denable_compile_warnings=ON - -* Your commit message should follow the git habits, explained eg here: - http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html - * When you add/remove files, and/or make changes in the lists of files to build, please check that "make distcheck" still succeeds. This is needed to ensure that the generated archive is consistent. - -* If you want to debug memory allocation problems, here are a few hints: - - disable compiler optimizations, to have better backtraces; - - disable the mallocators, or it will be hard to match malloc's with - free's; - - disable model checking, unless your problem lies in the model - checker part of SimGrid (MC brings its own malloc implementation, - which valgrind doesn't understand). - All this is configured with: - cmake -Denable_model-checking=OFF \ - -Denable_mallocators=OFF \ - -Denable_compile_optimizations=OFF - -* If you break the logs (for example while hacking in the dynars), you - want to define XBT_LOG_MAYDAY at the beginning of log.h. It will - deactivate the whole logging mechanism, switching to printfs - instead. SimGrid becomes incredibly verbose when doing so, but it - you let you fixing the dynars.