diff options
author | Rickard Green <[email protected]> | 2013-05-16 17:36:12 +0200 |
---|---|---|
committer | Rickard Green <[email protected]> | 2013-05-16 17:36:12 +0200 |
commit | 80129f47df9b227c45b1298e64f3e62096d81bf2 (patch) | |
tree | 46ed6d985e6cc9a164cfde3e312f29ca51fdf3a1 /erts/emulator/beam/erl_bif_port.c | |
parent | d7e9fafa45eb96e3c34e24f03476a42e474701f0 (diff) | |
parent | febb7963a74930dccccd3d23ef56a54d27fd2549 (diff) | |
download | otp-80129f47df9b227c45b1298e64f3e62096d81bf2.tar.gz otp-80129f47df9b227c45b1298e64f3e62096d81bf2.tar.bz2 otp-80129f47df9b227c45b1298e64f3e62096d81bf2.zip |
Merge branch 'rickard/inet_db/OTP-11074' into maint
* rickard/inet_db/OTP-11074:
Do not treat port_set_data/port_get_data as signals
Conflicts:
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/erts_internal.beam
Diffstat (limited to 'erts/emulator/beam/erl_bif_port.c')
-rw-r--r-- | erts/emulator/beam/erl_bif_port.c | 173 |
1 files changed, 140 insertions, 33 deletions
diff --git a/erts/emulator/beam/erl_bif_port.c b/erts/emulator/beam/erl_bif_port.c index 44fa41c7b6..109c54fd7f 100644 --- a/erts/emulator/beam/erl_bif_port.c +++ b/erts/emulator/beam/erl_bif_port.c @@ -423,57 +423,164 @@ BIF_RETTYPE erts_internal_port_info_2(BIF_ALIST_2) } } +/* + * The erlang:port_set_data()/erlang:port_get_data() operations should + * be viewed as operations on a table (inet_db) with data values + * associated with port identifier keys. That is, these operations are + * *not* signals to/from ports. + */ + +#if (TAG_PRIMARY_IMMED1 & 0x3) == 0 +# error "erlang:port_set_data()/erlang:port_get_data() needs to be rewritten!" +#endif + +typedef struct { + ErtsThrPrgrLaterOp later_op; + Uint hsize; + Eterm data; + ErlOffHeap off_heap; + Eterm heap[1]; +} ErtsPortDataHeap; -BIF_RETTYPE erts_internal_port_set_data_2(BIF_ALIST_2) +static void +free_port_data_heap(void *vpdhp) { - Eterm ref; + erts_cleanup_offheap(&((ErtsPortDataHeap *) vpdhp)->off_heap); + erts_free(ERTS_ALC_T_PORT_DATA_HEAP, vpdhp); +} + +static ERTS_INLINE void +cleanup_old_port_data(erts_aint_t data) +{ + if ((data & 0x3) != 0) { + ASSERT(is_immed((Eterm) data)); + } + else { +#ifdef ERTS_SMP + ErtsPortDataHeap *pdhp = (ErtsPortDataHeap *) data; + size_t size; + ERTS_SMP_DATA_DEPENDENCY_READ_MEMORY_BARRIER; + size = sizeof(ErtsPortDataHeap) + pdhp->hsize*(sizeof(Eterm) - 1); + erts_schedule_thr_prgr_later_cleanup_op(free_port_data_heap, + (void *) pdhp, + &pdhp->later_op, + size); +#else + free_port_data_heap((void *) data); +#endif + } +} + +void +erts_init_port_data(Port *prt) +{ + erts_smp_atomic_init_nob(&prt->data, (erts_aint_t) am_undefined); +} + +void +erts_cleanup_port_data(Port *prt) +{ + ASSERT(erts_atomic32_read_nob(&prt->state) & ERTS_PORT_SFLGS_INVALID_LOOKUP); + cleanup_old_port_data(erts_smp_atomic_read_nob(&prt->data)); + erts_smp_atomic_set_nob(&prt->data, (erts_aint_t) THE_NON_VALUE); +} + +Uint +erts_port_data_size(Port *prt) +{ + erts_aint_t data = erts_smp_atomic_read_ddrb(&prt->data); + + if ((data & 0x3) != 0) { + ASSERT(is_immed((Eterm) (UWord) data)); + return (Uint) 0; + } + else { + ErtsPortDataHeap *pdhp = (ErtsPortDataHeap *) data; + return (Uint) sizeof(ErtsPortDataHeap) + pdhp->hsize*(sizeof(Eterm)-1); + } +} + +ErlOffHeap * +erts_port_data_offheap(Port *prt) +{ + erts_aint_t data = erts_smp_atomic_read_ddrb(&prt->data); + + if ((data & 0x3) != 0) { + ASSERT(is_immed((Eterm) (UWord) data)); + return NULL; + } + else { + ErtsPortDataHeap *pdhp = (ErtsPortDataHeap *) data; + return &pdhp->off_heap; + } +} + +BIF_RETTYPE port_set_data_2(BIF_ALIST_2) +{ + /* + * This is not a signal. See comment above. + */ + erts_aint_t data; Port* prt; prt = lookup_port(BIF_P, BIF_ARG_1); if (!prt) - BIF_RET(am_badarg); + BIF_ERROR(BIF_P, BADARG); - switch (erts_port_set_data(BIF_P, prt, BIF_ARG_2, &ref)) { - case ERTS_PORT_OP_CALLER_EXIT: - case ERTS_PORT_OP_BADARG: - case ERTS_PORT_OP_DROPPED: - BIF_RET(am_badarg); - case ERTS_PORT_OP_SCHEDULED: - ASSERT(is_internal_ref(ref)); - BIF_RET(ref); - case ERTS_PORT_OP_DONE: - BIF_RET(am_true); - default: - ERTS_INTERNAL_ERROR("Unexpected erts_port_set_data() result"); - BIF_RET(am_internal_error); + if (is_immed(BIF_ARG_2)) { + data = (erts_aint_t) BIF_ARG_2; + ASSERT((data & 0x3) != 0); } + else { + ErtsPortDataHeap *pdhp; + Uint hsize; + Eterm *hp; + + hsize = size_object(BIF_ARG_2); + pdhp = erts_alloc(ERTS_ALC_T_PORT_DATA_HEAP, + sizeof(ErtsPortDataHeap) + hsize*(sizeof(Eterm)-1)); + hp = &pdhp->heap[0]; + pdhp->off_heap.first = NULL; + pdhp->off_heap.overhead = 0; + pdhp->data = copy_struct(BIF_ARG_2, hsize, &hp, &pdhp->off_heap); + data = (erts_aint_t) pdhp; + ASSERT((data & 0x3) == 0); + } + + data = erts_smp_atomic_xchg_wb(&prt->data, data); + + cleanup_old_port_data(data); + + BIF_RET(am_true); } -BIF_RETTYPE erts_internal_port_get_data_1(BIF_ALIST_1) +BIF_RETTYPE port_get_data_1(BIF_ALIST_1) { - Eterm retval; + /* + * This is not a signal. See comment above. + */ + Eterm res; + erts_aint_t data; Port* prt; prt = lookup_port(BIF_P, BIF_ARG_1); if (!prt) - BIF_RET(am_badarg); + BIF_ERROR(BIF_P, BADARG); - switch (erts_port_get_data(BIF_P, prt, &retval)) { - case ERTS_PORT_OP_CALLER_EXIT: - case ERTS_PORT_OP_BADARG: - case ERTS_PORT_OP_DROPPED: - BIF_RET(am_badarg); - case ERTS_PORT_OP_SCHEDULED: - ASSERT(is_internal_ref(retval)); - BIF_RET(retval); - case ERTS_PORT_OP_DONE: - ASSERT(is_not_internal_ref(retval)); - BIF_RET(retval); - default: - ERTS_INTERNAL_ERROR("Unexpected erts_port_get_data() result"); - BIF_RET(am_internal_error); + data = erts_smp_atomic_read_ddrb(&prt->data); + + if ((data & 0x3) != 0) { + res = (Eterm) (UWord) data; + ASSERT(is_immed(res)); + } + else { + ErtsPortDataHeap *pdhp = (ErtsPortDataHeap *) data; + Eterm *hp = HAlloc(BIF_P, pdhp->hsize); + res = copy_struct(pdhp->data, pdhp->hsize, &hp, &MSO(BIF_P)); } + + BIF_RET(res); } /* |