src/egl/main/egldisplay.c

   1 /**
   2  * Functions related to EGLDisplay.
   3  */
   4
   5 #include <assert.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include "eglcontext.h"
   9 #include "eglsurface.h"
  10 #include "egldisplay.h"
  11 #include "egldriver.h"
  12 #include "eglglobals.h"
  13 #include "eglmutex.h"
  14 #include "egllog.h"
  15
  16
  17 /**
  18  * Finish display management.
  19  */
  20 void
  21 _eglFiniDisplay(void)
  22 {
  23    _EGLDisplay *dpyList, *dpy;
  24
  25    /* atexit function is called with global mutex locked */
  26    dpyList = _eglGlobal.DisplayList;
  27    while (dpyList) {
  28       EGLint i;
  29
  30       /* pop list head */
  31       dpy = dpyList;
  32       dpyList = dpyList->Next;
  33
  34       for (i = 0; i < _EGL_NUM_RESOURCES; i++) {
  35          if (dpy->ResourceLists[i]) {
  36             _eglLog(_EGL_DEBUG, "Display %p is destroyed with resources", dpy);
  37             break;
  38          }
  39       }
  40
  41       free(dpy);
  42    }
  43    _eglGlobal.DisplayList = NULL;
  44 }
  45
  46
  47 /**
  48  * Find the display corresponding to the specified native display, or create a
  49  * new one.
  50  */
  51 _EGLDisplay *
  52 _eglFindDisplay(EGLNativeDisplayType nativeDisplay)
  53 {
  54    _EGLDisplay *dpy;
  55
  56    _eglLockMutex(_eglGlobal.Mutex);
  57
  58    /* search the display list first */
  59    dpy = _eglGlobal.DisplayList;
  60    while (dpy) {
  61       if (dpy->NativeDisplay == nativeDisplay)
  62          break;
  63       dpy = dpy->Next;
  64    }
  65
  66    /* create a new display */
  67    if (!dpy) {
  68       dpy = (_EGLDisplay *) calloc(1, sizeof(_EGLDisplay));
  69       if (dpy) {
  70          _eglInitMutex(&dpy->Mutex);
  71          dpy->NativeDisplay = nativeDisplay;
  72
  73          /* add to the display list */
  74          dpy->Next = _eglGlobal.DisplayList;
  75          _eglGlobal.DisplayList = dpy;
  76       }
  77    }
  78
  79    _eglUnlockMutex(_eglGlobal.Mutex);
  80
  81    return dpy;
  82 }
  83
  84
  85 /**
  86  * Destroy the contexts and surfaces that are linked to the display.
  87  */
  88 void
  89 _eglReleaseDisplayResources(_EGLDriver *drv, _EGLDisplay *display)
  90 {
  91    _EGLResource *list;
  92
  93    list = display->ResourceLists[_EGL_RESOURCE_CONTEXT];
  94    while (list) {
  95       _EGLContext *ctx = (_EGLContext *) list;
  96       list = list->Next;
  97
  98       _eglUnlinkContext(ctx);
  99       drv->API.DestroyContext(drv, display, ctx);
 100    }
 101    assert(!display->ResourceLists[_EGL_RESOURCE_CONTEXT]);
 102
 103    list = display->ResourceLists[_EGL_RESOURCE_SURFACE];
 104    while (list) {
 105       _EGLSurface *surf = (_EGLSurface *) list;
 106       list = list->Next;
 107
 108       _eglUnlinkSurface(surf);
 109       drv->API.DestroySurface(drv, display, surf);
 110    }
 111    assert(!display->ResourceLists[_EGL_RESOURCE_SURFACE]);
 112 }
 113
 114
 115 /**
 116  * Free all the data hanging of an _EGLDisplay object, but not
 117  * the object itself.
 118  */
 119 void
 120 _eglCleanupDisplay(_EGLDisplay *disp)
 121 {
 122    EGLint i;
 123
 124    if (disp->Configs) {
 125       for (i = 0; i < disp->NumConfigs; i++)
 126          free(disp->Configs[i]);
 127       free(disp->Configs);
 128       disp->Configs = NULL;
 129       disp->NumConfigs = 0;
 130       disp->MaxConfigs = 0;
 131    }
 132
 133    /* XXX incomplete */
 134 }
 135
 136
 137 /**
 138  * Return EGL_TRUE if the given handle is a valid handle to a display.
 139  */
 140 EGLBoolean
 141 _eglCheckDisplayHandle(EGLDisplay dpy)
 142 {
 143    _EGLDisplay *cur;
 144
 145    _eglLockMutex(_eglGlobal.Mutex);
 146    cur = _eglGlobal.DisplayList;
 147    while (cur) {
 148       if (cur == (_EGLDisplay *) dpy)
 149          break;
 150       cur = cur->Next;
 151    }
 152    _eglUnlockMutex(_eglGlobal.Mutex);
 153    return (cur != NULL);
 154 }
 155
 156
 157 /**
 158  * Return EGL_TRUE if the given resource is valid.  That is, the display does
 159  * own the resource.
 160  */
 161 EGLBoolean
 162 _eglCheckResource(void *res, _EGLResourceType type, _EGLDisplay *dpy)
 163 {
 164    _EGLResource *list = dpy->ResourceLists[type];
 165
 166    if (!res)
 167       return EGL_FALSE;
 168
 169    while (list) {
 170       if (res == (void *) list) {
 171          assert(list->Display == dpy);
 172          break;
 173       }
 174       list = list->Next;
 175    }
 176
 177    return (list != NULL);
 178 }
 179
 180
 181 /**
 182  * Link a resource to a display.
 183  */
 184 void
 185 _eglLinkResource(_EGLResource *res, _EGLResourceType type, _EGLDisplay *dpy)
 186 {
 187    assert(!res->Display || res->Display == dpy);
 188
 189    res->Display = dpy;
 190    res->IsLinked = EGL_TRUE;
 191    res->Next = dpy->ResourceLists[type];
 192    dpy->ResourceLists[type] = res;
 193 }
 194
 195
 196 /**
 197  * Unlink a linked resource from its display.
 198  */
 199 void
 200 _eglUnlinkResource(_EGLResource *res, _EGLResourceType type)
 201 {
 202    _EGLResource *prev;
 203
 204    prev = res->Display->ResourceLists[type];
 205    if (prev != res) {
 206       while (prev) {
 207          if (prev->Next == res)
 208             break;
 209          prev = prev->Next;
 210       }
 211       assert(prev);
 212       prev->Next = res->Next;
 213    }
 214    else {
 215       res->Display->ResourceLists[type] = res->Next;
 216    }
 217
 218    res->Next = NULL;
 219    /* do not reset res->Display */
 220    res->IsLinked = EGL_FALSE;
 221 }