/*
- * Copyright (c) 1995, Index Data.
+ * Copyright (c) 1995-2003, Index Data.
* See the file LICENSE for details.
* Sebastian Hammer, Adam Dickmeiss
*
- * $Log: nmem.c,v $
- * 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 <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>
+#endif
+
+#if YAZ_POSIX_THREADS
+#include <pthread.h>
+#endif
+
+#if YAZ_GNU_THREADS
+#include <pth.h>
+#endif
-#include <xmalloc.h>
-#include <nmem.h>
+#define NMEM_CHUNK (4*1024)
-#define NMEM_CHUNK (10*1024)
+#ifdef WIN32
+static CRITICAL_SECTION critical_section;
+#define NMEM_ENTER EnterCriticalSection(&critical_section)
+#define NMEM_LEAVE LeaveCriticalSection(&critical_section)
+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
-typedef struct nmem_block
+YAZ_EXPORT void nmem_mutex_create(NMEM_MUTEX *p)
{
- char *buf; /* memory allocated in this block */
- int size; /* size of buf */
- int top; /* top of buffer */
- struct nmem_block *next;
-} nmem_block;
+ 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;
+}
-typedef struct nmem_control
+YAZ_EXPORT void nmem_mutex_enter(NMEM_MUTEX p)
{
- int total;
- nmem_block *blocks;
-} nmem_control;
+ if (p)
+ {
+#ifdef WIN32
+ EnterCriticalSection(&p->m_handle);
+#elif YAZ_POSIX_THREADS
+ pthread_mutex_lock(&p->m_handle);
+#endif
+ }
+}
-static nmem_block *freelist = 0; /* global freelist */
+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
+ }
+}
-static void free_block(nmem_block *p)
+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
+ 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
+ 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)
break;
if (r)
+ {
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "nmem get_block found free block p=%p", r);
+#endif
if (l)
l->next = r->next;
else
freelist = r->next;
+ }
else
{
int get = NMEM_CHUNK;
if (get < size)
get = size;
- r = xmalloc(sizeof(*r));
- r->buf = xmalloc(r->size = get);
+#if NMEM_DEBUG
+ 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);
}
r->top = 0;
return r;
{
nmem_block *t;
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "nmem_reset p=%p", n);
+#endif
if (!n)
return;
+ NMEM_ENTER;
while (n->blocks)
{
t = n->blocks;
free_block(t);
}
n->total = 0;
+ NMEM_LEAVE;
}
+#if NMEM_DEBUG
+void *nmem_malloc_f (const char *file, int line, NMEM n, int size)
+#else
void *nmem_malloc(NMEM n, int size)
+#endif
{
struct nmem_block *p;
char *r;
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
+ n, size);
+#endif
if (!n)
- return xmalloc(size);
+ {
+ yaz_log (LOG_FATAL, "calling nmem_malloc with an null pointer");
+ abort ();
+ }
+#ifdef WIN32
+ assert (nmem_init_flag);
+#endif
+ NMEM_ENTER;
p = n->blocks;
if (!p || p->size - p->top < size)
{
/* align size */
p->top += (size + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
n->total += size;
+ NMEM_LEAVE;
return r;
}
return n->total;
}
+#if NMEM_DEBUG
+NMEM nmem_create_f(const char *file, int line)
+#else
NMEM nmem_create(void)
+#endif
{
- NMEM r = xmalloc(sizeof(*r));
+ NMEM r;
+#if NMEM_DEBUG
+ struct nmem_debug_info *debug_p;
+#endif
+ NMEM_ENTER;
+ nmem_active_no++;
+ r = cfreelist;
+ if (r)
+ cfreelist = cfreelist->next;
+ else
+ r = (nmem_control *)xmalloc(sizeof(*r));
+ NMEM_LEAVE;
+
+#if NMEM_DEBUG
+ 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;
}
+#if NMEM_DEBUG
+void nmem_destroy_f(const char *file, int line, NMEM n)
+#else
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);
- xfree(n);
+ NMEM_ENTER;
+ nmem_active_no--;
+ n->next = cfreelist;
+ cfreelist = n;
+ NMEM_LEAVE;
+}
+
+void nmem_transfer (NMEM dst, NMEM src)
+{
+ nmem_block *t;
+ while ((t=src->blocks))
+ {
+ src->blocks = t->next;
+ t->next = dst->blocks;
+ dst->blocks = t;
+ }
+ dst->total += src->total;
+ src->total = 0;
+}
+
+void nmem_critical_enter (void)
+{
+ NMEM_ENTER;
+}
+
+void nmem_critical_leave (void)
+{
+ NMEM_LEAVE;
+}
+
+void nmem_init (void)
+{
+ if (++nmem_init_flag == 1)
+ {
+#ifdef WIN32
+ InitializeCriticalSection(&critical_section);
+#elif YAZ_GNU_THREADS
+ yaz_log (LOG_LOG, "pth_init");
+ pth_init ();
+#endif
+ nmem_active_no = 0;
+ freelist = NULL;
+ cfreelist = NULL;
+ }
+}
+
+void nmem_exit (void)
+{
+ if (--nmem_init_flag == 0)
+ {
+ 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
+ }
+}
+
+
+#ifdef WIN32
+BOOL WINAPI DllMain (HINSTANCE hinstDLL,
+ DWORD reason,
+ LPVOID reserved)
+{
+ switch (reason)
+ {
+ case DLL_PROCESS_ATTACH:
+ nmem_init ();
+ break;
+ case DLL_PROCESS_DETACH:
+ nmem_exit ();
+ }
+ 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