winsup/cygwin/tls_pbuf.cc

   1 /* tls_pbuf.cc
   2
   3 This software is a copyrighted work licensed under the terms of the
   4 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   5 details. */
   6
   7 #include <winsup.h>
   8 #include <malloc.h>
   9 #include "tls_pbuf.h"
  10
  11 #define tls_pbuf        _my_tls.locals.pathbufs
  12
  13 void
  14 tls_pathbuf::create ()
  15 {
  16   tls_heap = HeapCreate (HEAP_NO_SERIALIZE | HEAP_GENERATE_EXCEPTIONS,
  17                          NT_MAX_PATH * sizeof (WCHAR) * 10,     /* 640K */
  18                          NT_MAX_PATH * TP_NUM_C_BUFS            /* 4.6M */
  19                          + NT_MAX_PATH * TP_NUM_W_BUFS * sizeof (WCHAR));
  20 }
  21
  22 void
  23 tls_pathbuf::destroy ()
  24 {
  25   if (tls_heap)
  26     HeapDestroy (tls_heap);
  27 }
  28
  29 char *
  30 tmp_pathbuf::c_get ()
  31 {
  32   if (!tls_pbuf.tls_heap)
  33     tls_pbuf.create ();
  34   if (tls_pbuf.c_cnt >= TP_NUM_C_BUFS)
  35     api_fatal ("Internal error: TP_NUM_C_BUFS too small: %u", TP_NUM_C_BUFS);
  36   if (!tls_pbuf.c_buf[tls_pbuf.c_cnt]
  37       && !(tls_pbuf.c_buf[tls_pbuf.c_cnt]
  38            = (char *) HeapAlloc (tls_pbuf.tls_heap, 0, NT_MAX_PATH)))
  39     api_fatal ("Internal error: Out of memory for new path buf.");
  40   return tls_pbuf.c_buf[tls_pbuf.c_cnt++];
  41 }
  42
  43 PWCHAR
  44 tmp_pathbuf::w_get ()
  45 {
  46   if (!tls_pbuf.tls_heap)
  47     tls_pbuf.create ();
  48   if (tls_pbuf.w_cnt >= TP_NUM_W_BUFS)
  49     api_fatal ("Internal error: TP_NUM_W_BUFS too small: %u.", TP_NUM_W_BUFS);
  50   if (!tls_pbuf.w_buf[tls_pbuf.w_cnt]
  51       && !(tls_pbuf.w_buf[tls_pbuf.w_cnt]
  52            = (PWCHAR) HeapAlloc (tls_pbuf.tls_heap, 0,
  53                                  NT_MAX_PATH * sizeof (WCHAR))))
  54     api_fatal ("Internal error: Out of memory for new wide path buf.");
  55   return tls_pbuf.w_buf[tls_pbuf.w_cnt++];
  56 }