src/lib/ecore_file/ecore_file_monitor.c

   1 /*
   2  * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
   3  */
   4
   5 #ifdef HAVE_CONFIG_H
   6 # include <config.h>
   7 #endif
   8
   9 #include "ecore_file_private.h"
  10
  11 static int init = 0;
  12
  13 typedef enum {
  14      ECORE_FILE_MONITOR_TYPE_NONE,
  15 #ifdef HAVE_INOTIFY
  16      ECORE_FILE_MONITOR_TYPE_INOTIFY,
  17 #endif
  18 #ifdef HAVE_POLL
  19      ECORE_FILE_MONITOR_TYPE_POLL
  20 #endif
  21 } Ecore_File_Monitor_Type;
  22
  23 static Ecore_File_Monitor_Type monitor_type = ECORE_FILE_MONITOR_TYPE_NONE;
  24
  25 int
  26 ecore_file_monitor_init(void)
  27 {
  28    if (++init != 1) return init;
  29
  30 #ifdef HAVE_INOTIFY
  31    monitor_type = ECORE_FILE_MONITOR_TYPE_INOTIFY;
  32    if (ecore_file_monitor_inotify_init())
  33      return init;
  34 #endif
  35 #ifdef HAVE_POLL
  36    monitor_type = ECORE_FILE_MONITOR_TYPE_POLL;
  37    if (ecore_file_monitor_poll_init())
  38      return init;
  39 #endif
  40    monitor_type = ECORE_FILE_MONITOR_TYPE_NONE;
  41    return --init;
  42 }
  43
  44 int
  45 ecore_file_monitor_shutdown(void)
  46 {
  47    if (--init != 0) return init;
  48
  49    switch (monitor_type)
  50      {
  51       case ECORE_FILE_MONITOR_TYPE_NONE:
  52          break;
  53 #ifdef HAVE_INOTIFY
  54       case ECORE_FILE_MONITOR_TYPE_INOTIFY:
  55          ecore_file_monitor_inotify_shutdown();
  56          break;
  57 #endif
  58 #ifdef HAVE_POLL
  59       case ECORE_FILE_MONITOR_TYPE_POLL:
  60          ecore_file_monitor_poll_shutdown();
  61          break;
  62 #endif
  63      }
  64    return init;
  65 }
  66
  67 /**
  68  * Monitor a path using inotify or polling
  69  * @param  path The path to monitor
  70  * @param  func The function to call on changes
  71  * @param  data The data passed to func
  72  * @return An Ecore_File_Monitor pointer or NULL on failure
  73  */
  74 EAPI Ecore_File_Monitor *
  75 ecore_file_monitor_add(const char *path,
  76                 void (*func) (void *data, Ecore_File_Monitor *em,
  77                       Ecore_File_Event event,
  78                       const char *path),
  79                 void *data)
  80 {
  81    switch (monitor_type)
  82      {
  83       case ECORE_FILE_MONITOR_TYPE_NONE:
  84          return NULL;
  85 #ifdef HAVE_INOTIFY
  86       case ECORE_FILE_MONITOR_TYPE_INOTIFY:
  87          return ecore_file_monitor_inotify_add(path, func, data);
  88 #endif
  89 #ifdef HAVE_POLL
  90       case ECORE_FILE_MONITOR_TYPE_POLL:
  91          return ecore_file_monitor_poll_add(path, func, data);
  92 #endif
  93      }
  94    return NULL;
  95 }
  96
  97 /**
  98  * Stop monitoring a path
  99  * @param  em The Ecore_File_Monitor to stop
 100  */
 101 EAPI void
 102 ecore_file_monitor_del(Ecore_File_Monitor *em)
 103 {
 104    switch (monitor_type)
 105      {
 106       case ECORE_FILE_MONITOR_TYPE_NONE:
 107          break;
 108 #ifdef HAVE_INOTIFY
 109       case ECORE_FILE_MONITOR_TYPE_INOTIFY:
 110          ecore_file_monitor_inotify_del(em);
 111          break;
 112 #endif
 113 #ifdef HAVE_POLL
 114       case ECORE_FILE_MONITOR_TYPE_POLL:
 115          ecore_file_monitor_poll_del(em);
 116          break;
 117 #endif
 118      }
 119 }
 120
 121 /**
 122  * Get the monitored path
 123  * @param  em The Ecore_File_Monitor to query
 124  * @return The path that is monitored by @p em
 125  */
 126 EAPI const char *
 127 ecore_file_monitor_path_get(Ecore_File_Monitor *em)
 128 {
 129    return em->path;
 130 }