src/rt/rust_crate_cache.cpp

   1
   2 #include "rust_internal.h"
   3 #include <algorithm>
   4
   5 type_desc *
   6 rust_crate_cache::get_type_desc(size_t size,
   7                                 size_t align,
   8                                 size_t n_descs,
   9                                 type_desc const **descs,
  10                                 uintptr_t n_obj_params)
  11 {
  12     I(sched, n_descs > 1);
  13     type_desc *td = NULL;
  14     size_t keysz = n_descs * sizeof(type_desc*);
  15     HASH_FIND(hh, this->type_descs, descs, keysz, td);
  16     if (td) {
  17         DLOG(sched, cache, "rust_crate_cache::get_type_desc hit");
  18
  19         // FIXME: This is a gross hack.
  20         td->n_obj_params = std::max(td->n_obj_params, n_obj_params);
  21
  22         return td;
  23     }
  24     DLOG(sched, cache, "rust_crate_cache::get_type_desc miss");
  25     td = (type_desc*) sched->kernel->malloc(sizeof(type_desc) + keysz,
  26                                             "crate cache typedesc");
  27     if (!td)
  28         return NULL;
  29     // By convention, desc 0 is the root descriptor.
  30     // but we ignore the size and alignment of it and use the
  31     // passed-in, computed values.
  32     memcpy(td, descs[0], sizeof(type_desc));
  33     td->first_param = &td->descs[1];
  34     td->size = size;
  35     td->align = align;
  36     for (size_t i = 0; i < n_descs; ++i) {
  37         DLOG(sched, cache,
  38                  "rust_crate_cache::descs[%" PRIdPTR "] = 0x%" PRIxPTR,
  39                  i, descs[i]);
  40         td->descs[i] = descs[i];
  41     }
  42     td->n_obj_params = n_obj_params;
  43     td->n_params = n_descs - 1;
  44     HASH_ADD(hh, this->type_descs, descs, keysz, td);
  45     return td;
  46 }
  47
  48 rust_crate_cache::rust_crate_cache(rust_scheduler *sched)
  49     : type_descs(NULL),
  50       sched(sched),
  51       idx(0)
  52 {
  53 }
  54
  55 void
  56 rust_crate_cache::flush() {
  57     DLOG(sched, cache, "rust_crate_cache::flush()");
  58
  59     while (type_descs) {
  60         type_desc *d = type_descs;
  61         HASH_DEL(type_descs, d);
  62         DLOG(sched, mem, "rust_crate_cache::flush() tydesc %" PRIxPTR, d);
  63         sched->kernel->free(d);
  64     }
  65 }
  66
  67 rust_crate_cache::~rust_crate_cache()
  68 {
  69     flush();
  70 }
  71
  72 //
  73 // Local Variables:
  74 // mode: C++
  75 // fill-column: 78;
  76 // indent-tabs-mode: nil
  77 // c-basic-offset: 4
  78 // buffer-file-coding-system: utf-8-unix
  79 // compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
  80 // End:
  81 //