Show HN: A simple garbage collector for C
1–10 of 62 posts
Re: Show HN: A simple garbage collector for C
#2Is there a simple GC like this one that uses handles instead of C stack scanning to keep track of local references?
Re: Show HN: A simple garbage collector for C
#3Is there a simple GC like this one that uses handles instead of C stack scanning to keep track of local references?
The Boehm GC seems to do both internally.
Re: Show HN: A simple garbage collector for C
#4I just wish C had something like defer in go, That would cover most cases.
Re: Show HN: A simple garbage collector for C
#5I just wish C had something like defer in go, That would cover most cases.
Defer can be emulated with the block extensions of Clang and GCC [0], though I'm not sure how much I'd like to see something like that in a codebase.
[0] https://web.archive.org/web/20180426195701/http://fdiv.net/2...
Re: Show HN: A simple garbage collector for C
#6Cool! Thanks for this - and the link to orangeduck’s work (which further points to Cello.)
Re: Show HN: A simple garbage collector for C
#7I just wish C had something like defer in go, That would cover most cases.
Defer can be emulated with the block extensions of Clang and GCC [0], though I'm not sure how much I'd like to see something like that in a codebase. [0] https://web.archive.org/web/20180426195701/http://fdiv.net/2...
That link seems to be broken? Nothing opens when I click it.
Re: Show HN: A simple garbage collector for C
#8Earlier quoted context omitted.
Defer can be emulated with the block extensions of Clang and GCC [0], though I'm not sure how much I'd like to see something like that in a codebase. [0] https://web.archive.org/web/20180426195701/http://fdiv.net/2...
That link seems to be broken? Nothing opens when I click it.
Works fine for me. It's using __attribute__((cleanup)) to call a function that calls the block you give it.
Re: Show HN: A simple garbage collector for C
#9Earlier quoted context omitted.
Defer can be emulated with the block extensions of Clang and GCC [0], though I'm not sure how much I'd like to see something like that in a codebase. [0] https://web.archive.org/web/20180426195701/http://fdiv.net/2...
That link seems to be broken? Nothing opens when I click it.
It's a short article, and worth reading if you can work out why the Wayback Machine isn't working for you.
The magic is basically:
static inline void defer_cleanup(void (^*b)(void)) { (*b)(); }
#define defer_merge(a,b) a##b
#define defer_varname(a) defer_merge(defer_scopevar_, a)
#define defer __attribute__((cleanup(defer_cleanup))) void (^defer_varname(__COUNTER__))(void) =
FILE *a = fopen ("a.txt", "r");
if (!a)
return EXIT_FAILURE;
defer
{
fclose (a);
};
Re: Show HN: A simple garbage collector for C
#10I just wish C had something like defer in go, That would cover most cases.
If you're willing to use macros, this can do the trick.
Return and break will preempt the expression, but continue should work fine.
#define DEFER(EXPR) for(int _tmp=1; _tmp; _tmp=0,(EXPR))
char * data = malloc(32);
DEFER(free(data))
{
// do stuff
}