1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
*
* Copyright (c) 2018 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "dlopen_fuchsia.h"
#include <fcntl.h>
#include <fuchsia/vulkan/loader/c/fidl.h>
#include <lib/fdio/io.h>
#include <lib/fdio/directory.h>
#include <stdio.h>
#include <string.h>
#include <threads.h>
#include <zircon/dlfcn.h>
#include <zircon/syscalls.h>
static char g_error[128] = {};
const char *dlerror_fuchsia(void) { return g_error; }
static zx_handle_t vulkan_loader_svc = ZX_HANDLE_INVALID;
void connect_to_vulkan_loader_svc(void) {
zx_handle_t svc1, svc2;
if (zx_channel_create(0, &svc1, &svc2) != ZX_OK) return;
if (fdio_service_connect("/svc/" fuchsia_vulkan_loader_Loader_Name, svc1) != ZX_OK) {
zx_handle_close(svc2);
return;
}
vulkan_loader_svc = svc2;
}
static once_flag svc_connect_once_flag = ONCE_FLAG_INIT;
void *dlopen_fuchsia(const char *name, int mode, bool driver) {
// First try to just dlopen() from our own namespace. This will succeed for
// any layers that are packaged with the application, but will fail for
// client drivers loaded from the system.
void *result;
if (!driver) {
result = dlopen(name, mode);
if (result != NULL) return result;
}
// If we couldn't find the library in our own namespace, connect to the
// loader service to request this library.
call_once(&svc_connect_once_flag, connect_to_vulkan_loader_svc);
if (vulkan_loader_svc == ZX_HANDLE_INVALID) {
snprintf(g_error, sizeof(g_error), "libvulkan.so:dlopen_fuchsia: no connection to loader svc\n");
return NULL;
}
zx_handle_t vmo = ZX_HANDLE_INVALID;
zx_status_t st = fuchsia_vulkan_loader_LoaderGet(vulkan_loader_svc, name, strlen(name), &vmo);
if (st != ZX_OK) {
snprintf(g_error, sizeof(g_error), "libvulkan.so:dlopen_fuchsia: Get() failed: %d\n", st);
return NULL;
}
if (vmo == ZX_HANDLE_INVALID) {
snprintf(g_error, sizeof(g_error), "libvulkan.so:dlopen_fuchsia: Get() returned invalid vmo\n");
return NULL;
}
result = dlopen_vmo(vmo, mode);
zx_handle_close(vmo);
if (!result) {
snprintf(g_error, sizeof(g_error), "%s", dlerror());
}
return result;
}
|
