29 /* A simple allocator that suballocates memory from a large buffer. */
48 u_suballocator_init(struct u_suballocator *allocator,  in u_suballocator_init()  argument
54    memset(allocator, 0, sizeof(*allocator));  in u_suballocator_init()
56    allocator->pipe = pipe;  in u_suballocator_init()
57    allocator->size = size;  in u_suballocator_init()
58    allocator->bind = bind;  in u_suballocator_init()
59    allocator->usage = usage;  in u_suballocator_init()
60    allocator->flags = flags;  in u_suballocator_init()
61    allocator->zero_buffer_memory = zero_buffer_memory;  in u_suballocator_init()
65 u_suballocator_destroy(struct u_suballocator *allocator)  in u_suballocator_destroy()  argument
67    pipe_resource_reference(&allocator->buffer, NULL);  in u_suballocator_destroy()
71 u_suballocator_alloc(struct u_suballocator *allocator, unsigned size,  in u_suballocator_alloc()  argument
75    allocator->offset = align(allocator->offset, alignment);  in u_suballocator_alloc()
78    if (size > allocator->size)  in u_suballocator_alloc()
82    if (!allocator->buffer ||  in u_suballocator_alloc()
83        allocator->offset + size > allocator->size) {  in u_suballocator_alloc()
85       pipe_resource_reference(&allocator->buffer, NULL);  in u_suballocator_alloc()
86       allocator->offset = 0;  in u_suballocator_alloc()
92       templ.bind = allocator->bind;  in u_suballocator_alloc()
93       templ.usage = allocator->usage;  in u_suballocator_alloc()
94       templ.flags = allocator->flags;  in u_suballocator_alloc()
95       templ.width0 = allocator->size;  in u_suballocator_alloc()
100       struct pipe_screen *screen = allocator->pipe->screen;  in u_suballocator_alloc()
101       allocator->buffer = screen->resource_create(screen, &templ);  in u_suballocator_alloc()
102       if (!allocator->buffer)  in u_suballocator_alloc()
106       if (allocator->zero_buffer_memory) {  in u_suballocator_alloc()
107          struct pipe_context *pipe = allocator->pipe;  in u_suballocator_alloc()
112             pipe->clear_buffer(pipe, allocator->buffer, 0, allocator->size,  in u_suballocator_alloc()
116             void *ptr = pipe_buffer_map(pipe, allocator->buffer,  in u_suballocator_alloc()
118             memset(ptr, 0, allocator->size);  in u_suballocator_alloc()
124    assert(allocator->offset % alignment == 0);  in u_suballocator_alloc()
125    assert(allocator->offset < allocator->buffer->width0);  in u_suballocator_alloc()
126    assert(allocator->offset + size <= allocator->buffer->width0);  in u_suballocator_alloc()
129    *out_offset = allocator->offset;  in u_suballocator_alloc()
130    pipe_resource_reference(outbuf, allocator->buffer);  in u_suballocator_alloc()
132    allocator->offset += size;  in u_suballocator_alloc()