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>C: anything by antirez (redis, etc...) Redis is the epitome of well written understandable C. The first file I opened has 3 gotos but maybe it's pure randomne

• lorenzhs 11y ago
  gotos are sometimes used in C for error handling (to release resources), it's a simple way to do cleanup: void foo() { int* foo = malloc(...) if (foo == NULL) goto err_foo; int* bar = malloc(...) if (bar == NULL) goto err_bar; /* code */ err_bar: free(bar); err_foo: free(foo); } That's a use of goto that's often considered non-evil, probably because the alternatives are typically a lot more ugly.
  • lokeshk 11y ago
    Sorry to be a stickler, but the error handling in your method "frees" a resource even when nothing was allocated to it. Freeing a null pointer is as such an undefined behavior.
    • Someone 11y ago
      http://www.open-std.org/JTC1/SC22/wg14/www/docs/n1124.pdf http://www.open-std.org/JTC1/SC22/wg14/www/docs/n1124.pdf, section 7.20.3.2 "The free function": "The free function causes the space pointed to by ptr to be deallocated, that is, made available for further allocation. If ptr is a null pointer, no action occurs."
    • PeCaN 11y ago
      Dereferencing a null pointer is undefined behavior. free() on NULL is defined to be a no-op.