Drizzled Public API Documentation

check_stack_overrun.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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4  * Copyright (C) 2008 Sun Microsystems, Inc.
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18  */
19 
20 #include <config.h>
21 #include <drizzled/internal/my_sys.h>
22 #include <drizzled/definitions.h>
23 #include <drizzled/session.h>
24 #include <drizzled/error.h>
25 #include <drizzled/check_stack_overrun.h>
26 
27 namespace drizzled
28 {
29 
30 /****************************************************************************
31  Check stack size; Send error if there isn't enough stack to continue
32 ****************************************************************************/
33 #if defined(STACK_DIRECTION) && (STACK_DIRECTION < 0)
34 static const bool stack_direction_negative = true;
35 #else
36 static const bool stack_direction_negative = false;
37 #endif
38 
39 template <typename A_T, typename B_T>
40 inline static long used_stack(A_T A, B_T B)
41 {
42  if (stack_direction_negative)
43  return (long) (A - B);
44  else
45  return (long) (B - A);
46 }
47 
48 extern size_t my_thread_stack_size;
49 
50 bool check_stack_overrun(Session *session, long margin, void *)
51 {
52  long stack_used;
53  if ((stack_used=used_stack(session->thread_stack,(char*) &stack_used)) >=
54  (long) (my_thread_stack_size - margin))
55  {
56  my_printf_error(ER_STACK_OVERRUN_NEED_MORE, ER(ER_STACK_OVERRUN_NEED_MORE),
57  MYF(ME_FATALERROR),
58  stack_used,my_thread_stack_size,margin);
59  return true;
60  }
61  return false;
62 }
63 
64 } /* namespace drizzled */
TODO: Rename this file - func.h is stupid.
char * thread_stack
Definition: session.h:211
bool check_stack_overrun(Session *session, long margin, void *)