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| author | Björn-Egil Dahlberg <[email protected]> | 2014-06-16 14:47:18 +0200 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2014-08-22 18:59:11 +0200 |
| commit | 44edeae19bec364b9689f84b06da140e47401eb3 (patch) | |
| tree | 14cacd66afce4653383f3b601eb59f9e445be59b | |
| parent | 5bef994dd5f13c8c5d8b1e9f4c55cb2d655b7fb6 (diff) | |
| download | otp-44edeae19bec364b9689f84b06da140e47401eb3.tar.gz otp-44edeae19bec364b9689f84b06da140e47401eb3.tar.bz2 otp-44edeae19bec364b9689f84b06da140e47401eb3.zip | |
erts: Add BIF erlang:get_keys/0
Returns a list of all keys in the process dictionary.
| -rw-r--r-- | erts/emulator/beam/bif.tab | 11 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_process_dict.c | 52 |
2 files changed, 61 insertions, 2 deletions
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab index e68b8e6274..55ac778475 100644 --- a/erts/emulator/beam/bif.tab +++ b/erts/emulator/beam/bif.tab @@ -578,7 +578,7 @@ bif io:printable_range/0 bif os:unsetenv/1 # -# New in R17A +# New in 17.0 # bif re:inspect/2 @@ -601,9 +601,16 @@ bif maps:values/1 bif erts_internal:cmp_term/2 # -# New in 17.1. +# New in 17.1 # + bif erlang:fun_info_mfa/1 + +# New in 18.0 +# + +bif erlang:get_keys/0 + # # Obsolete # diff --git a/erts/emulator/beam/erl_process_dict.c b/erts/emulator/beam/erl_process_dict.c index 23e5bf737f..3ce707efda 100644 --- a/erts/emulator/beam/erl_process_dict.c +++ b/erts/emulator/beam/erl_process_dict.c @@ -82,6 +82,7 @@ static void pd_hash_erase(Process *p, Eterm id, Eterm *ret); static void pd_hash_erase_all(Process *p); static Eterm pd_hash_get_keys(Process *p, Eterm value); +static Eterm pd_hash_get_all_keys(Process *p, ProcDict *pd); static Eterm pd_hash_get_all(Process *p, ProcDict *pd); static Eterm pd_hash_put(Process *p, Eterm id, Eterm value); @@ -275,6 +276,16 @@ BIF_RETTYPE get_1(BIF_ALIST_1) BIF_RET(ret); } +BIF_RETTYPE get_keys_0(BIF_ALIST_0) +{ + Eterm ret; + + PD_CHECK(BIF_P->dictionary); + ret = pd_hash_get_all_keys(BIF_P,BIF_P->dictionary); + PD_CHECK(BIF_P->dictionary); + BIF_RET(ret); +} + BIF_RETTYPE get_keys_1(BIF_ALIST_1) { Eterm ret; @@ -412,6 +423,47 @@ Eterm erts_pd_hash_get(Process *p, Eterm id) return am_undefined; } +#define PD_GET_TKEY(Dst,Src) \ +do { \ + ASSERT(is_tuple((Src))); \ + ASSERT(arityval(*((Eterm*)tuple_val((Src)))) == 2); \ + (Dst) = ((Eterm*)tuple_val((Src)))[1]; \ +} while(0) + +static Eterm pd_hash_get_all_keys(Process *p, ProcDict *pd) { + Eterm* hp; + Eterm res = NIL; + Eterm tmp, tmp2; + unsigned int i; + unsigned int num; + + if (pd == NULL) { + return res; + } + + num = HASH_RANGE(pd); + hp = HAlloc(p, pd->numElements * 2); + + for (i = 0; i < num; ++i) { + tmp = ARRAY_GET(pd, i); + if (is_boxed(tmp)) { + PD_GET_TKEY(tmp,tmp); + res = CONS(hp, tmp, res); + hp += 2; + } else if (is_list(tmp)) { + while (tmp != NIL) { + tmp2 = TCAR(tmp); + PD_GET_TKEY(tmp2,tmp2); + res = CONS(hp, tmp2, res); + hp += 2; + tmp = TCDR(tmp); + } + } + } + return res; +} +#undef PD_GET_TKEY + static Eterm pd_hash_get_keys(Process *p, Eterm value) { Eterm *hp; |