From a510bc3ee1a696da120c09ee4ec33dc033f671ac Mon Sep 17 00:00:00 2001 From: Brian Date: Tue, 6 Mar 2007 10:07:59 -0700 Subject: Fix/improve framebuffer object reference counting. Use _mesa_reference_framebuffer() and _mesa_unreference_framebuffer() functions to be sure reference counting is done correctly. Additional assertions are done too. Note _mesa_dereference_framebuffer() renamed to "unreference" as that's more accurate. --- src/mesa/main/context.c | 25 ++++++++++++------------ src/mesa/main/fbobject.c | 32 ++++++++++-------------------- src/mesa/main/framebuffer.c | 46 ++++++++++++++++++++++++++++++-------------- src/mesa/main/framebuffer.h | 6 +++++- src/mesa/main/rbadaptors.c | 6 +++--- src/mesa/main/renderbuffer.c | 23 +++++++++++----------- src/mesa/main/renderbuffer.h | 2 +- 7 files changed, 76 insertions(+), 64 deletions(-) (limited to 'src/mesa/main') diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c index 1245c10cc2..135c814c0a 100644 --- a/src/mesa/main/context.c +++ b/src/mesa/main/context.c @@ -1408,6 +1408,13 @@ _mesa_free_context_data( GLcontext *ctx ) if (ctx == _mesa_get_current_context()) { _mesa_make_current(NULL, NULL, NULL); } + else { + /* unreference WinSysDraw/Read buffers */ + _mesa_unreference_framebuffer(&ctx->WinSysDrawBuffer); + _mesa_unreference_framebuffer(&ctx->WinSysReadBuffer); + _mesa_unreference_framebuffer(&ctx->DrawBuffer); + _mesa_unreference_framebuffer(&ctx->ReadBuffer); + } _mesa_free_lighting_data( ctx ); _mesa_free_eval_data( ctx ); @@ -1694,12 +1701,8 @@ _mesa_make_current( GLcontext *newCtx, GLframebuffer *drawBuffer, ASSERT(_mesa_get_current_context() == newCtx); if (oldCtx) { - if (oldCtx->WinSysDrawBuffer) { - _mesa_dereference_framebuffer(&oldCtx->WinSysDrawBuffer); - } - if (oldCtx->WinSysReadBuffer) { - _mesa_dereference_framebuffer(&oldCtx->WinSysReadBuffer); - } + _mesa_unreference_framebuffer(&oldCtx->WinSysDrawBuffer); + _mesa_unreference_framebuffer(&oldCtx->WinSysReadBuffer); } if (!newCtx) { @@ -1713,20 +1716,18 @@ _mesa_make_current( GLcontext *newCtx, GLframebuffer *drawBuffer, ASSERT(drawBuffer->Name == 0); ASSERT(readBuffer->Name == 0); - newCtx->WinSysDrawBuffer = drawBuffer; - newCtx->WinSysReadBuffer = readBuffer; - drawBuffer->RefCount++; - readBuffer->RefCount++; + _mesa_reference_framebuffer(&newCtx->WinSysDrawBuffer, drawBuffer); + _mesa_reference_framebuffer(&newCtx->WinSysReadBuffer, readBuffer); /* * Only set the context's Draw/ReadBuffer fields if they're NULL * or not bound to a user-created FBO. */ if (!newCtx->DrawBuffer || newCtx->DrawBuffer->Name == 0) { - newCtx->DrawBuffer = drawBuffer; + _mesa_reference_framebuffer(&newCtx->DrawBuffer, drawBuffer); } if (!newCtx->ReadBuffer || newCtx->ReadBuffer->Name == 0) { - newCtx->ReadBuffer = readBuffer; + _mesa_reference_framebuffer(&newCtx->ReadBuffer, readBuffer); } newCtx->NewState |= _NEW_BUFFERS; diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c index a99ff9dc97..6608eefc6c 100644 --- a/src/mesa/main/fbobject.c +++ b/src/mesa/main/fbobject.c @@ -602,7 +602,7 @@ _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer) oldRb = ctx->CurrentRenderbuffer; if (oldRb) { - _mesa_dereference_renderbuffer(&oldRb); + _mesa_unreference_renderbuffer(&oldRb); } ASSERT(newRb != &DummyRenderbuffer); @@ -639,7 +639,7 @@ _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers) /* But the object will not be freed until it's no longer * bound in any context. */ - _mesa_dereference_renderbuffer(&rb); + _mesa_unreference_renderbuffer(&rb); } } } @@ -998,12 +998,6 @@ _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer) } _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb); } - _glthread_LOCK_MUTEX(newFb->Mutex); - if (bindReadBuf) - newFb->RefCount++; - if (bindDrawBuf) - newFb->RefCount++; - _glthread_UNLOCK_MUTEX(newFb->Mutex); } else { /* Binding the window system framebuffer (which was originally set @@ -1020,22 +1014,16 @@ _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer) */ if (bindReadBuf) { - struct gl_framebuffer *oldFb = ctx->ReadBuffer; - if (oldFb && oldFb->Name != 0) { - _mesa_dereference_framebuffer(&oldFb); - } - ctx->ReadBuffer = newFb; + _mesa_unreference_framebuffer(&ctx->ReadBuffer); + _mesa_reference_framebuffer(&ctx->ReadBuffer, newFb); } if (bindDrawBuf) { - struct gl_framebuffer *oldFb = ctx->DrawBuffer; - if (oldFb && oldFb->Name != 0) { - /* check if old FB had any texture attachments */ - check_end_texture_render(ctx, oldFb); - /* check if time to delete this framebuffer */ - _mesa_dereference_framebuffer(&oldFb); - } - ctx->DrawBuffer = newFb; + /* check if old FB had any texture attachments */ + check_end_texture_render(ctx, ctx->DrawBuffer); + /* check if time to delete this framebuffer */ + _mesa_unreference_framebuffer(&ctx->DrawBuffer); + _mesa_reference_framebuffer(&ctx->DrawBuffer, newFb); if (newFb->Name != 0) { /* check if newly bound framebuffer has any texture attachments */ check_begin_texture_render(ctx, newFb); @@ -1083,7 +1071,7 @@ _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers) /* But the object will not be freed until it's no longer * bound in any context. */ - _mesa_dereference_framebuffer(&fb); + _mesa_unreference_framebuffer(&fb); } } } diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c index dabc96d91d..c97d2f0077 100644 --- a/src/mesa/main/framebuffer.c +++ b/src/mesa/main/framebuffer.c @@ -78,7 +78,7 @@ set_depth_renderbuffer(struct gl_framebuffer *fb, struct gl_renderbuffer *rb) { if (fb->_DepthBuffer) { - _mesa_dereference_renderbuffer(&fb->_DepthBuffer); + _mesa_unreference_renderbuffer(&fb->_DepthBuffer); } fb->_DepthBuffer = rb; if (rb) { @@ -96,7 +96,7 @@ set_stencil_renderbuffer(struct gl_framebuffer *fb, struct gl_renderbuffer *rb) { if (fb->_StencilBuffer) { - _mesa_dereference_renderbuffer(&fb->_StencilBuffer); + _mesa_unreference_renderbuffer(&fb->_StencilBuffer); } fb->_StencilBuffer = rb; if (rb) { @@ -223,7 +223,7 @@ _mesa_free_framebuffer_data(struct gl_framebuffer *fb) for (i = 0; i < BUFFER_COUNT; i++) { struct gl_renderbuffer_attachment *att = &fb->Attachment[i]; if (att->Renderbuffer) { - _mesa_dereference_renderbuffer(&att->Renderbuffer); + _mesa_unreference_renderbuffer(&att->Renderbuffer); } if (att->Texture) { /* render to texture */ @@ -236,7 +236,6 @@ _mesa_free_framebuffer_data(struct gl_framebuffer *fb) } } att->Type = GL_NONE; - att->Renderbuffer = NULL; att->Texture = NULL; } @@ -247,25 +246,44 @@ _mesa_free_framebuffer_data(struct gl_framebuffer *fb) /** - * Decrement the reference count on a framebuffer and delete it when + * Set *ptr to point to fb, with refcounting and locking. + */ +void +_mesa_reference_framebuffer(struct gl_framebuffer **ptr, + struct gl_framebuffer *fb) +{ + assert(ptr); + assert(!*ptr); + assert(fb); + _glthread_LOCK_MUTEX(fb->Mutex); + fb->RefCount++; + _glthread_UNLOCK_MUTEX(fb->Mutex); + *ptr = fb; +} + + +/** + * Undo/remove a reference to a framebuffer object. + * Decrement the framebuffer object's reference count and delete it when * the refcount hits zero. - * Note: we pass the address of a pointer and set it to NULL if we delete it. + * Note: we pass the address of a pointer and set it to NULL. */ void -_mesa_dereference_framebuffer(struct gl_framebuffer **fb) +_mesa_unreference_framebuffer(struct gl_framebuffer **fb) { - GLboolean deleteFlag = GL_FALSE; + assert(fb); + if (*fb) { + GLboolean deleteFlag = GL_FALSE; - _glthread_LOCK_MUTEX((*fb)->Mutex); - { + _glthread_LOCK_MUTEX((*fb)->Mutex); ASSERT((*fb)->RefCount > 0); (*fb)->RefCount--; deleteFlag = ((*fb)->RefCount == 0); - } - _glthread_UNLOCK_MUTEX((*fb)->Mutex); + _glthread_UNLOCK_MUTEX((*fb)->Mutex); + + if (deleteFlag) + (*fb)->Delete(*fb); - if (deleteFlag) { - (*fb)->Delete(*fb); *fb = NULL; } } diff --git a/src/mesa/main/framebuffer.h b/src/mesa/main/framebuffer.h index 7f3254fe8e..4d76f3a90f 100644 --- a/src/mesa/main/framebuffer.h +++ b/src/mesa/main/framebuffer.h @@ -43,7 +43,11 @@ extern void _mesa_free_framebuffer_data(struct gl_framebuffer *buffer); extern void -_mesa_dereference_framebuffer(struct gl_framebuffer **fb); +_mesa_reference_framebuffer(struct gl_framebuffer **ptr, + struct gl_framebuffer *fb); + +extern void +_mesa_unreference_framebuffer(struct gl_framebuffer **fb); extern void _mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb, diff --git a/src/mesa/main/rbadaptors.c b/src/mesa/main/rbadaptors.c index 313c8d43d6..60f4948bec 100644 --- a/src/mesa/main/rbadaptors.c +++ b/src/mesa/main/rbadaptors.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.5.1 + * Version: 6.5.3 * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -45,7 +45,7 @@ Delete_wrapper(struct gl_renderbuffer *rb) /* Decrement reference count on the buffer we're wrapping and delete * it if refcount hits zero. */ - _mesa_dereference_renderbuffer(&rb->Wrapped); + _mesa_unreference_renderbuffer(&rb->Wrapped); /* delete myself */ _mesa_delete_renderbuffer(rb); diff --git a/src/mesa/main/renderbuffer.c b/src/mesa/main/renderbuffer.c index 6b18d60baf..1cc95a7d3b 100644 --- a/src/mesa/main/renderbuffer.c +++ b/src/mesa/main/renderbuffer.c @@ -2089,32 +2089,33 @@ _mesa_remove_renderbuffer(struct gl_framebuffer *fb, GLuint bufferName) if (!rb) return; - _mesa_dereference_renderbuffer(&rb); + _mesa_unreference_renderbuffer(&rb); fb->Attachment[bufferName].Renderbuffer = NULL; } /** - * Decrement the reference count on a renderbuffer and delete it when + * Decrement a renderbuffer object's reference count and delete it when * the refcount hits zero. - * Note: we pass the address of a pointer and set it to NULL if we delete it. + * Note: we pass the address of a pointer. */ void -_mesa_dereference_renderbuffer(struct gl_renderbuffer **rb) +_mesa_unreference_renderbuffer(struct gl_renderbuffer **rb) { - GLboolean deleteFlag = GL_FALSE; + assert(rb); + if (*rb) { + GLboolean deleteFlag = GL_FALSE; - _glthread_LOCK_MUTEX((*rb)->Mutex); - { + _glthread_LOCK_MUTEX((*rb)->Mutex); ASSERT((*rb)->RefCount > 0); (*rb)->RefCount--; deleteFlag = ((*rb)->RefCount == 0); - } - _glthread_UNLOCK_MUTEX((*rb)->Mutex); + _glthread_UNLOCK_MUTEX((*rb)->Mutex); + + if (deleteFlag) + (*rb)->Delete(*rb); - if (deleteFlag) { - (*rb)->Delete(*rb); *rb = NULL; } } diff --git a/src/mesa/main/renderbuffer.h b/src/mesa/main/renderbuffer.h index 74ca43c57a..e1a0a55979 100644 --- a/src/mesa/main/renderbuffer.h +++ b/src/mesa/main/renderbuffer.h @@ -99,7 +99,7 @@ extern void _mesa_remove_renderbuffer(struct gl_framebuffer *fb, GLuint bufferName); extern void -_mesa_dereference_renderbuffer(struct gl_renderbuffer **rb); +_mesa_unreference_renderbuffer(struct gl_renderbuffer **rb); extern struct gl_renderbuffer * _mesa_new_depthstencil_renderbuffer(GLcontext *ctx, GLuint name); -- cgit v1.2.3