util/hash_set: Rework the API to know about hashing

Previously, the set API required the user to do all of the hashing of keys
as it passed them in.  Since the hashing function is intrinsically tied to
the comparison function, it makes sense for the hash set to know about
it.  Also, it makes for a somewhat clumsy API as the user is constantly
calling hashing functions many of which have long names.  This is
especially bad when the standard call looks something like

_mesa_set_add(ht, _mesa_pointer_hash(key), key);

In the above case, there is no reason why the hash set shouldn't do the
hashing for you.  We leave the option for you to do your own hashing if
it's more efficient, but it's no longer needed.  Also, if you do do your
own hashing, the hash set will assert that your hash matches what it
expects out of the hashing function.  This should make it harder to mess up
your hashing.

This is analygous to 94303a0750 where we did this for hash_table

Signed-off-by: Jason Ekstrand <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

3 files changed, 14 insertions, 18 deletions

diff --git a/src/mesa/main/shared.c b/src/mesa/main/shared.c
index 2389c13159e..ccf5355f3c4 100644
--- a/src/mesa/main/shared.c
+++ b/src/mesa/main/shared.c
@@ -119,7 +119,8 @@ _mesa_alloc_shared_state(struct gl_context *ctx)
    shared->FrameBuffers = _mesa_NewHashTable();
    shared->RenderBuffers = _mesa_NewHashTable();
 
-   shared->SyncObjects = _mesa_set_create(NULL, _mesa_key_pointer_equal);
+   shared->SyncObjects = _mesa_set_create(NULL, _mesa_hash_pointer,
+                                          _mesa_key_pointer_equal);
 
    return shared;
 }
diff --git a/src/mesa/main/syncobj.c b/src/mesa/main/syncobj.c
index 8832775ebb8..c1b2d3bed54 100644
--- a/src/mesa/main/syncobj.c
+++ b/src/mesa/main/syncobj.c
@@ -173,9 +173,7 @@ _mesa_validate_sync(struct gl_context *ctx,
                     const struct gl_sync_object *syncObj)
 {
    return (syncObj != NULL)
-      && _mesa_set_search(ctx->Shared->SyncObjects,
-                          _mesa_hash_pointer(syncObj),
-                          syncObj) != NULL
+      && _mesa_set_search(ctx->Shared->SyncObjects, syncObj) != NULL
       && (syncObj->Type == GL_SYNC_FENCE)
       && !syncObj->DeletePending;
 }
@@ -198,9 +196,7 @@ _mesa_unref_sync_object(struct gl_context *ctx, struct gl_sync_object *syncObj)
    mtx_lock(&ctx->Shared->Mutex);
    syncObj->RefCount--;
    if (syncObj->RefCount == 0) {
-      entry = _mesa_set_search(ctx->Shared->SyncObjects,
-                               _mesa_hash_pointer(syncObj),
-                               syncObj);
+      entry = _mesa_set_search(ctx->Shared->SyncObjects, syncObj);
       assert (entry != NULL);
       _mesa_set_remove(ctx->Shared->SyncObjects, entry);
       mtx_unlock(&ctx->Shared->Mutex);
@@ -289,9 +285,7 @@ _mesa_FenceSync(GLenum condition, GLbitfield flags)
       ctx->Driver.FenceSync(ctx, syncObj, condition, flags);
 
       mtx_lock(&ctx->Shared->Mutex);
-      _mesa_set_add(ctx->Shared->SyncObjects,
-                    _mesa_hash_pointer(syncObj),
-                    syncObj);
+      _mesa_set_add(ctx->Shared->SyncObjects, syncObj);
       mtx_unlock(&ctx->Shared->Mutex);
 
       return (GLsync) syncObj;
diff --git a/src/mesa/main/vdpau.c b/src/mesa/main/vdpau.c
index 89d731b6e74..0efa56e4f41 100644
--- a/src/mesa/main/vdpau.c
+++ b/src/mesa/main/vdpau.c
@@ -73,7 +73,8 @@ _mesa_VDPAUInitNV(const GLvoid *vdpDevice, const GLvoid *getProcAddress)
 
    ctx->vdpDevice = vdpDevice;
    ctx->vdpGetProcAddress = getProcAddress;
-   ctx->vdpSurfaces = _mesa_set_create(NULL, _mesa_key_pointer_equal);
+   ctx->vdpSurfaces = _mesa_set_create(NULL, _mesa_hash_pointer,
+                                       _mesa_key_pointer_equal);
 }
 
 static void
@@ -179,7 +180,7 @@ register_surface(struct gl_context *ctx, GLboolean isOutput,
       _mesa_reference_texobj(&surf->textures[i], tex);
    }
 
-   _mesa_set_add(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf);
+   _mesa_set_add(ctx->vdpSurfaces, surf);
 
    return (GLintptr)surf;
 }
@@ -227,7 +228,7 @@ _mesa_VDPAUIsSurfaceNV(GLintptr surface)
       return false;
    }
 
-   if (!_mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf)) {
+   if (!_mesa_set_search(ctx->vdpSurfaces, surf)) {
       return false;
    }
 
@@ -251,7 +252,7 @@ _mesa_VDPAUUnregisterSurfaceNV(GLintptr surface)
    if (surface == 0)
       return;
 
-   entry = _mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf);
+   entry = _mesa_set_search(ctx->vdpSurfaces, surf);
    if (!entry) {
       _mesa_error(ctx, GL_INVALID_VALUE, "VDPAUUnregisterSurfaceNV");
       return;
@@ -280,7 +281,7 @@ _mesa_VDPAUGetSurfaceivNV(GLintptr surface, GLenum pname, GLsizei bufSize,
       return;
    }
 
-   if (!_mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf)) {
+   if (!_mesa_set_search(ctx->vdpSurfaces, surf)) {
       _mesa_error(ctx, GL_INVALID_VALUE, "VDPAUGetSurfaceivNV");
       return;
    }
@@ -312,7 +313,7 @@ _mesa_VDPAUSurfaceAccessNV(GLintptr surface, GLenum access)
       return;
    }
 
-   if (!_mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf)) {
+   if (!_mesa_set_search(ctx->vdpSurfaces, surf)) {
       _mesa_error(ctx, GL_INVALID_VALUE, "VDPAUSurfaceAccessNV");
       return;
    }
@@ -346,7 +347,7 @@ _mesa_VDPAUMapSurfacesNV(GLsizei numSurfaces, const GLintptr *surfaces)
    for (i = 0; i < numSurfaces; ++i) {
       struct vdp_surface *surf = (struct vdp_surface *)surfaces[i];
 
-      if (!_mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf)) {
+      if (!_mesa_set_search(ctx->vdpSurfaces, surf)) {
          _mesa_error(ctx, GL_INVALID_VALUE, "VDPAUSurfaceAccessNV");
          return;
       }
@@ -400,7 +401,7 @@ _mesa_VDPAUUnmapSurfacesNV(GLsizei numSurfaces, const GLintptr *surfaces)
    for (i = 0; i < numSurfaces; ++i) {
       struct vdp_surface *surf = (struct vdp_surface *)surfaces[i];
 
-      if (!_mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf)) {
+      if (!_mesa_set_search(ctx->vdpSurfaces, surf)) {
          _mesa_error(ctx, GL_INVALID_VALUE, "VDPAUSurfaceAccessNV");
          return;
       }