/*
- * Copyright (c) 1995-1999, Index Data.
+ * Copyright (c) 1995-2003, Index Data.
* See the file LICENSE for details.
* Sebastian Hammer, Adam Dickmeiss
*
- * $Log: nmem.c,v $
- * Revision 1.16 1999-03-31 11:18:25 adam
- * Implemented odr_strdup. Added Reference ID to backend server API.
- *
- * Revision 1.15 1999/02/11 09:10:26 adam
- * Function nmem_init only mandatory on Windows.
- *
- * Revision 1.14 1999/02/02 13:57:40 adam
- * Uses preprocessor define WIN32 instead of WINDOWS to build code
- * for Microsoft WIN32.
- *
- * Revision 1.13 1998/10/19 15:24:21 adam
- * New nmem utility, nmem_transfer, that transfer blocks from one
- * NMEM to another.
- *
- * Revision 1.12 1998/10/13 16:00:18 adam
- * Implemented nmem_critical_{enter,leave}.
- *
- * Revision 1.11 1998/08/21 14:13:36 adam
- * Added GNU Configure script to build Makefiles.
- *
- * Revision 1.10 1998/07/20 12:35:57 adam
- * Added more memory diagnostics (when NMEM_DEBUG is 1).
- *
- * Revision 1.9 1998/07/07 15:49:01 adam
- * Reduced chunk size.
- *
- * Revision 1.8 1998/07/03 14:21:27 adam
- * Added critical sections for pthreads-library. Thanks to Ian Ibbotson,
- * Fretwell Downing Informatics.
- *
- * Revision 1.7 1998/02/11 11:53:36 adam
- * Changed code so that it compiles as C++.
- *
- * Revision 1.6 1997/10/31 12:20:09 adam
- * Improved memory debugging for xmalloc/nmem.c. References to NMEM
- * instead of ODR in n ESPEC-1 handling in source d1_espec.c.
- * Bug fix: missing fclose in data1_read_espec1.
- *
- * Revision 1.5 1997/10/06 09:09:52 adam
- * Function mmem_exit releases memory used by the freelists.
- *
- * Revision 1.4 1997/09/29 07:12:50 adam
- * NMEM thread safe. NMEM must be initialized before use (sigh) -
- * routine nmem_init/nmem_exit implemented.
- *
- * Revision 1.3 1997/07/21 12:47:38 adam
- * Moved definition of nmem_control and nmem_block.
- *
- * Revision 1.2 1995/12/13 13:44:37 quinn
- * Modified Data1-system to use nmem
- *
- * Revision 1.1 1995/11/13 09:27:52 quinn
- * Fiddling with the variant stuff.
- *
- *
+ * $Id: nmem.c,v 1.39 2003-01-06 08:20:28 adam Exp $
*/
/*
* This is a simple and fairly wasteful little module for nibble memory
* allocation. Evemtually we'll put in something better.
*/
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <assert.h>
-#include <xmalloc.h>
-#include <nmem.h>
-#include <log.h>
+#include <string.h>
+#include <errno.h>
+#include <yaz/xmalloc.h>
+#include <yaz/nmem.h>
+#include <yaz/log.h>
+#include <yaz/oid.h>
+
#ifdef WIN32
#include <windows.h>
-#elif _REENTRANT
+#endif
-#if HAVE_PTHREAD_H
+#if YAZ_POSIX_THREADS
#include <pthread.h>
-#elif HAVE_THREAD_H
-#include <thread.h>
#endif
+#if YAZ_GNU_THREADS
+#include <pth.h>
#endif
#define NMEM_CHUNK (4*1024)
static CRITICAL_SECTION critical_section;
#define NMEM_ENTER EnterCriticalSection(&critical_section)
#define NMEM_LEAVE LeaveCriticalSection(&critical_section)
-#elif _REENTRANT
+struct nmem_mutex {
+ CRITICAL_SECTION m_handle;
+};
+#elif YAZ_POSIX_THREADS
static pthread_mutex_t nmem_mutex = PTHREAD_MUTEX_INITIALIZER;
#define NMEM_ENTER pthread_mutex_lock(&nmem_mutex);
#define NMEM_LEAVE pthread_mutex_unlock(&nmem_mutex);
+struct nmem_mutex {
+ pthread_mutex_t m_handle;
+};
+#elif YAZ_GNU_THREADS
+static pth_mutex_t nmem_mutex = PTH_MUTEX_INIT;
+#define NMEM_ENTER pth_mutex_acquire(&nmem_mutex, 0, 0)
+#define NMEM_LEAVE pth_mutex_release(&nmem_mutex)
+struct nmem_mutex {
+ pth_mutex_t m_handle;
+};
#else
#define NMEM_ENTER
#define NMEM_LEAVE
+struct nmem_mutex {
+ int dummy;
+};
+#endif
+
+YAZ_EXPORT void nmem_mutex_create(NMEM_MUTEX *p)
+{
+ NMEM_ENTER;
+ if (!*p)
+ {
+ *p = (NMEM_MUTEX) malloc (sizeof(**p));
+#ifdef WIN32
+ InitializeCriticalSection(&(*p)->m_handle);
+#elif YAZ_POSIX_THREADS
+ pthread_mutex_init (&(*p)->m_handle, 0);
+#elif YAZ_GNU_THREADS
+ pth_mutex_init (&(*p)->m_handle);
+#endif
+ }
+ NMEM_LEAVE;
+}
+
+YAZ_EXPORT void nmem_mutex_enter(NMEM_MUTEX p)
+{
+ if (p)
+ {
+#ifdef WIN32
+ EnterCriticalSection(&p->m_handle);
+#elif YAZ_POSIX_THREADS
+ pthread_mutex_lock(&p->m_handle);
#endif
+ }
+}
+
+YAZ_EXPORT void nmem_mutex_leave(NMEM_MUTEX p)
+{
+ if (p)
+ {
+#ifdef WIN32
+ LeaveCriticalSection(&p->m_handle);
+#elif YAZ_POSIX_THREADS
+ pthread_mutex_unlock(&p->m_handle);
+#endif
+ }
+}
+
+YAZ_EXPORT void nmem_mutex_destroy(NMEM_MUTEX *p)
+{
+ NMEM_ENTER;
+ if (*p)
+ {
+#ifdef WIN32
+ DeleteCriticalSection(&(*p)->m_handle);
+#endif
+ free (*p);
+ *p = 0;
+ }
+ NMEM_LEAVE;
+}
static nmem_block *freelist = NULL; /* "global" freelists */
static nmem_control *cfreelist = NULL;
static int nmem_active_no = 0;
static int nmem_init_flag = 0;
+#if NMEM_DEBUG
+struct nmem_debug_info {
+ void *p;
+ char file[40];
+ int line;
+ struct nmem_debug_info *next;
+};
+
+struct nmem_debug_info *nmem_debug_list = 0;
+#endif
+
static void free_block(nmem_block *p)
{
p->next = freelist;
freelist = p;
#if NMEM_DEBUG
- logf (LOG_DEBUG, "nmem free_block p=%p", p);
+ yaz_log (LOG_DEBUG, "nmem free_block p=%p", p);
#endif
}
+#if NMEM_DEBUG
+void nmem_print_list (void)
+{
+ struct nmem_debug_info *p;
+
+ yaz_log (LOG_DEBUG, "nmem print list");
+ NMEM_ENTER;
+ for (p = nmem_debug_list; p; p = p->next)
+ yaz_log (LOG_DEBUG, " %s:%d p=%p size=%d", p->file, p->line, p->p,
+ nmem_total(p->p));
+ NMEM_LEAVE;
+}
+#endif
/*
* acquire a block with a minimum of size free bytes.
*/
nmem_block *r, *l;
#if NMEM_DEBUG
- logf (LOG_DEBUG, "nmem get_block size=%d", size);
+ yaz_log (LOG_DEBUG, "nmem get_block size=%d", size);
#endif
for (r = freelist, l = 0; r; l = r, r = r->next)
if (r->size >= size)
if (r)
{
#if NMEM_DEBUG
- logf (LOG_DEBUG, "nmem get_block found free block p=%p", r);
+ yaz_log (LOG_DEBUG, "nmem get_block found free block p=%p", r);
#endif
if (l)
l->next = r->next;
if (get < size)
get = size;
#if NMEM_DEBUG
- logf (LOG_DEBUG, "nmem get_block alloc new block size=%d", get);
+ yaz_log (LOG_DEBUG, "nmem get_block alloc new block size=%d", get);
#endif
r = (nmem_block *)xmalloc(sizeof(*r));
r->buf = (char *)xmalloc(r->size = get);
nmem_block *t;
#if NMEM_DEBUG
- logf (LOG_DEBUG, "nmem_reset p=%p", n);
+ yaz_log (LOG_DEBUG, "nmem_reset p=%p", n);
#endif
if (!n)
return;
char *r;
#if NMEM_DEBUG
- logf (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
n, size);
#endif
if (!n)
{
+ yaz_log (LOG_FATAL, "calling nmem_malloc with an null pointer");
abort ();
- return xmalloc(size);
}
#ifdef WIN32
assert (nmem_init_flag);
#endif
{
NMEM r;
+#if NMEM_DEBUG
+ struct nmem_debug_info *debug_p;
+#endif
NMEM_ENTER;
nmem_active_no++;
NMEM_LEAVE;
#if NMEM_DEBUG
- logf (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
- nmem_active_no-1, r);
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
+ nmem_active_no, r);
#endif
r->blocks = 0;
r->total = 0;
r->next = 0;
+
+#if NMEM_DEBUG
+ for (debug_p = nmem_debug_list; debug_p; debug_p = debug_p->next)
+ if (debug_p->p == r)
+ {
+ yaz_log (LOG_FATAL, "multi used block in nmem");
+ abort ();
+ }
+ debug_p = xmalloc (sizeof(*debug_p));
+ strncpy (debug_p->file, file, sizeof(debug_p->file)-1);
+ debug_p->file[sizeof(debug_p->file)-1] = '\0';
+ debug_p->line = line;
+ debug_p->p = r;
+ debug_p->next = nmem_debug_list;
+ nmem_debug_list = debug_p;
+
+ nmem_print_list();
+#endif
return r;
}
void nmem_destroy(NMEM n)
#endif
{
+#if NMEM_DEBUG
+ struct nmem_debug_info **debug_p;
+ int ok = 0;
+#endif
if (!n)
return;
+
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
+ nmem_active_no-1, n);
+ NMEM_ENTER;
+ for (debug_p = &nmem_debug_list; *debug_p; debug_p = &(*debug_p)->next)
+ if ((*debug_p)->p == n)
+ {
+ struct nmem_debug_info *debug_save = *debug_p;
+ *debug_p = (*debug_p)->next;
+ xfree (debug_save);
+ ok = 1;
+ break;
+ }
+ NMEM_LEAVE;
+ nmem_print_list();
+ if (!ok)
+ {
+ yaz_log (LOG_WARN, "%s:%d destroying unallocated nmem block p=%p",
+ file, line, n);
+ return;
+ }
+#endif
nmem_reset(n);
NMEM_ENTER;
nmem_active_no--;
n->next = cfreelist;
cfreelist = n;
NMEM_LEAVE;
-#if NMEM_DEBUG
- logf (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
- nmem_active_no, n);
-#endif
}
void nmem_transfer (NMEM dst, NMEM src)
void nmem_init (void)
{
- nmem_init_flag = 1;
+ if (++nmem_init_flag == 1)
+ {
#ifdef WIN32
- InitializeCriticalSection(&critical_section);
+ InitializeCriticalSection(&critical_section);
+#elif YAZ_GNU_THREADS
+ yaz_log (LOG_LOG, "pth_init");
+ pth_init ();
#endif
- nmem_active_no = 0;
- freelist = NULL;
- cfreelist = NULL;
+ nmem_active_no = 0;
+ freelist = NULL;
+ cfreelist = NULL;
+ }
}
void nmem_exit (void)
{
- while (freelist)
+ if (--nmem_init_flag == 0)
{
- struct nmem_block *fl = freelist;
- freelist = freelist->next;
- xfree (fl->buf);
- xfree (fl);
+ oid_exit();
+ while (freelist)
+ {
+ struct nmem_block *fl = freelist;
+ freelist = freelist->next;
+ xfree (fl->buf);
+ xfree (fl);
+ }
+ while (cfreelist)
+ {
+ struct nmem_control *cfl = cfreelist;
+ cfreelist = cfreelist->next;
+ xfree (cfl);
+ }
+#ifdef WIN32
+ DeleteCriticalSection(&critical_section);
+#endif
}
- while (cfreelist)
+}
+
+
+#ifdef WIN32
+BOOL WINAPI DllMain (HINSTANCE hinstDLL,
+ DWORD reason,
+ LPVOID reserved)
+{
+ switch (reason)
{
- struct nmem_control *cfl = cfreelist;
- cfreelist = cfreelist->next;
- xfree (cfl);
+ case DLL_PROCESS_ATTACH:
+ nmem_init ();
+ break;
+ case DLL_PROCESS_DETACH:
+ nmem_exit ();
}
-#ifdef WIN32
- DeleteCriticalSection(&critical_section);
+ return TRUE;
+}
#endif
+
+int yaz_errno(void)
+{
+ return errno;
}
+void yaz_set_errno(int v)
+{
+ errno = v;
+}
+
+void yaz_strerror(char *buf, int max)
+{
+ char *cp;
+#ifdef WIN32
+ DWORD err = GetLastError();
+ if (err)
+ {
+ FormatMessage(
+ FORMAT_MESSAGE_FROM_SYSTEM,
+ NULL,
+ err,
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
+ (LPTSTR) buf,
+ max-1,
+ NULL);
+ }
+ else
+ *buf = '\0';
+#else
+#if HAVE_STRERROR_R
+ strerror_r(errno, buf, max);
+#else
+ strcpy(buf, strerror(yaz_errno()));
+#endif
+#endif
+ if ((cp=strrchr(buf, '\n')))
+ *cp = '\0';
+ if ((cp=strrchr(buf, '\r')))
+ *cp = '\0';
+}
projects / yaz-moved-to-github.git / blobdiff