mono/io-layer/wapi-private.h

   1 /*
   2  * wapi-private.h:  internal definitions of handles and shared memory layout
   3  *
   4  * Author:
   5  *      Dick Porter (dick@ximian.com)
   6  *
   7  * (C) 2002-2006 Novell, Inc.
   8  */
   9
  10 #ifndef _WAPI_PRIVATE_H_
  11 #define _WAPI_PRIVATE_H_
  12
  13 #include <config.h>
  14 #include <glib.h>
  15
  16 #include <mono/io-layer/handles.h>
  17 #include <mono/io-layer/io.h>
  18
  19 /* Catch this here rather than corrupt the shared data at runtime */
  20 #if MONO_SIZEOF_SUNPATH==0
  21 #error configure failed to discover size of unix socket path
  22 #endif
  23
  24 /* Increment this whenever an incompatible change is made to the
  25  * shared handle structure.
  26  */
  27 #define _WAPI_HANDLE_VERSION 12
  28
  29 typedef enum {
  30         WAPI_HANDLE_UNUSED=0,
  31         WAPI_HANDLE_FILE,
  32         WAPI_HANDLE_CONSOLE,
  33         WAPI_HANDLE_THREAD,
  34         WAPI_HANDLE_SEM,
  35         WAPI_HANDLE_MUTEX,
  36         WAPI_HANDLE_EVENT,
  37         WAPI_HANDLE_SOCKET,
  38         WAPI_HANDLE_FIND,
  39         WAPI_HANDLE_PROCESS,
  40         WAPI_HANDLE_PIPE,
  41         WAPI_HANDLE_NAMEDMUTEX,
  42         WAPI_HANDLE_NAMEDSEM,
  43         WAPI_HANDLE_NAMEDEVENT,
  44         WAPI_HANDLE_COUNT
  45 } WapiHandleType;
  46
  47 extern const char *_wapi_handle_typename[];
  48
  49 #define _WAPI_SHARED_HANDLE(type) (type == WAPI_HANDLE_PROCESS || \
  50                                    type == WAPI_HANDLE_NAMEDMUTEX || \
  51                                    type == WAPI_HANDLE_NAMEDSEM || \
  52                                    type == WAPI_HANDLE_NAMEDEVENT)
  53
  54 #define _WAPI_FD_HANDLE(type) (type == WAPI_HANDLE_FILE || \
  55                                type == WAPI_HANDLE_CONSOLE || \
  56                                type == WAPI_HANDLE_SOCKET || \
  57                                type == WAPI_HANDLE_PIPE)
  58
  59 #define _WAPI_SHARED_NAMESPACE(type) (type == WAPI_HANDLE_NAMEDMUTEX || \
  60                                       type == WAPI_HANDLE_NAMEDSEM || \
  61                                       type == WAPI_HANDLE_NAMEDEVENT)
  62
  63 typedef struct
  64 {
  65         gchar name[MAX_PATH + 1];
  66 } WapiSharedNamespace;
  67
  68 typedef enum {
  69         WAPI_HANDLE_CAP_WAIT=0x01,
  70         WAPI_HANDLE_CAP_SIGNAL=0x02,
  71         WAPI_HANDLE_CAP_OWN=0x04,
  72         WAPI_HANDLE_CAP_SPECIAL_WAIT=0x08
  73 } WapiHandleCapability;
  74
  75 struct _WapiHandleOps
  76 {
  77         void (*close)(gpointer handle, gpointer data);
  78
  79         /* SignalObjectAndWait */
  80         void (*signal)(gpointer signal);
  81
  82         /* Called by WaitForSingleObject and WaitForMultipleObjects,
  83          * with the handle locked (shared handles aren't locked.)
  84          * Returns TRUE if ownership was established, false otherwise.
  85          */
  86         gboolean (*own_handle)(gpointer handle);
  87
  88         /* Called by WaitForSingleObject and WaitForMultipleObjects, if the
  89          * handle in question is "ownable" (ie mutexes), to see if the current
  90          * thread already owns this handle
  91          */
  92         gboolean (*is_owned)(gpointer handle);
  93
  94         /* Called by WaitForSingleObject and WaitForMultipleObjects,
  95          * if the handle in question needs a special wait function
  96          * instead of using the normal handle signal mechanism.
  97          * Returns the WaitForSingleObject return code.
  98          */
  99         guint32 (*special_wait)(gpointer handle, guint32 timeout);
 100
 101         /* Called by WaitForSingleObject and WaitForMultipleObjects,
 102          * if the handle in question needs some preprocessing before the
 103          * signal wait.
 104          */
 105         void (*prewait)(gpointer handle);
 106 };
 107
 108 #include <mono/io-layer/event-private.h>
 109 #include <mono/io-layer/io-private.h>
 110 #include <mono/io-layer/mutex-private.h>
 111 #include <mono/io-layer/semaphore-private.h>
 112 #include <mono/io-layer/socket-private.h>
 113 #include <mono/io-layer/thread-private.h>
 114 #include <mono/io-layer/process-private.h>
 115
 116 struct _WapiHandle_shared_ref
 117 {
 118         /* This will be split 16:16 with the shared file segment in
 119          * the top half, when I implement space increases
 120          */
 121         guint32 offset;
 122 };
 123
 124 #define _WAPI_HANDLE_INITIAL_COUNT 256
 125
 126 struct _WapiHandleUnshared
 127 {
 128         WapiHandleType type;
 129         guint ref;
 130         gboolean signalled;
 131         mono_mutex_t signal_mutex;
 132         pthread_cond_t signal_cond;
 133
 134         union
 135         {
 136                 struct _WapiHandle_event event;
 137                 struct _WapiHandle_file file;
 138                 struct _WapiHandle_find find;
 139                 struct _WapiHandle_mutex mutex;
 140                 struct _WapiHandle_sem sem;
 141                 struct _WapiHandle_socket sock;
 142                 struct _WapiHandle_thread thread;
 143                 struct _WapiHandle_shared_ref shared;
 144         } u;
 145 };
 146
 147 struct _WapiHandleShared
 148 {
 149         WapiHandleType type;
 150         guint32 timestamp;
 151         guint32 handle_refs;
 152         volatile gboolean signalled;
 153
 154         union
 155         {
 156                 struct _WapiHandle_process process;
 157                 struct _WapiHandle_namedmutex namedmutex;
 158                 struct _WapiHandle_namedsem namedsem;
 159                 struct _WapiHandle_namedevent namedevent;
 160         } u;
 161 };
 162
 163 #define _WAPI_SHARED_SEM_NAMESPACE 0
 164 /*#define _WAPI_SHARED_SEM_COLLECTION 1*/
 165 #define _WAPI_SHARED_SEM_FILESHARE 2
 166 #define _WAPI_SHARED_SEM_SHARED_HANDLES 3
 167 #define _WAPI_SHARED_SEM_PROCESS_COUNT_LOCK 6
 168 #define _WAPI_SHARED_SEM_PROCESS_COUNT 7
 169 #define _WAPI_SHARED_SEM_COUNT 8        /* Leave some future expansion space */
 170
 171 struct _WapiHandleSharedLayout
 172 {
 173         volatile guint32 collection_count;
 174         volatile key_t sem_key;
 175
 176         struct _WapiHandleShared handles[_WAPI_HANDLE_INITIAL_COUNT];
 177 };
 178
 179 #define _WAPI_FILESHARE_SIZE 102400
 180
 181 struct _WapiFileShare
 182 {
 183         dev_t device;
 184         ino_t inode;
 185         pid_t opened_by_pid;
 186         guint32 sharemode;
 187         guint32 access;
 188         guint32 handle_refs;
 189         guint32 timestamp;
 190 };
 191
 192 struct _WapiFileShareLayout
 193 {
 194         guint32 hwm;
 195
 196         struct _WapiFileShare share_info[_WAPI_FILESHARE_SIZE];
 197 };
 198
 199
 200
 201 #define _WAPI_HANDLE_INVALID (gpointer)-1
 202
 203 #endif /* _WAPI_PRIVATE_H_ */