[Beignet] [PATCH 53/57] Add cl_compiler_gen to use compiler backend.

[junyan.he at inbox.com]

From: Junyan He <junyan.he at intel.com>

cl_compiler_gen can find the compiler backend and load it
using dlopen function.

Signed-off-by: Junyan He <junyan.he at intel.com>
---
 runtime/gen/cl_compiler_gen.c | 94 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 runtime/gen/cl_compiler_gen.c

diff --git a/runtime/gen/cl_compiler_gen.c b/runtime/gen/cl_compiler_gen.c
new file mode 100644
index 0000000..00b29c0
--- /dev/null
+++ b/runtime/gen/cl_compiler_gen.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: He Junyan <junyan.he at intel.com>
+ */
+
+#include "cl_gen.h"
+#include <dlfcn.h>
+
+LOCAL cl_int
+cl_compiler_load_gen(cl_device_id device)
+{
+  const char *gbePath = NULL;
+  void *dlhCompiler = NULL;
+  void *genBuildProgram = NULL;
+  void *genLinkProgram = NULL;
+  void *genCompileProgram = NULL;
+  void *genCheckCompilerOption = NULL;
+
+  if (device->compiler.available == CL_TRUE)
+    return CL_SUCCESS;
+
+  gbePath = getenv("OCL_GBE_PATH");
+  if (gbePath == NULL || !strcmp(gbePath, ""))
+    gbePath = COMPILER_BACKEND_OBJECT;
+
+  dlhCompiler = dlopen(gbePath, RTLD_LAZY | RTLD_LOCAL);
+  if (dlhCompiler == NULL)
+    return CL_COMPILER_NOT_AVAILABLE;
+
+  genBuildProgram = dlsym(dlhCompiler, "GenBuildProgram");
+  if (genBuildProgram == NULL) {
+    dlclose(dlhCompiler);
+    return CL_COMPILER_NOT_AVAILABLE;
+  }
+
+  genCompileProgram = dlsym(dlhCompiler, "GenCompileProgram");
+  if (genCompileProgram == NULL) {
+    dlclose(dlhCompiler);
+    return CL_COMPILER_NOT_AVAILABLE;
+  }
+
+  genLinkProgram = dlsym(dlhCompiler, "GenLinkProgram");
+  if (genLinkProgram == NULL) {
+    dlclose(dlhCompiler);
+    return CL_COMPILER_NOT_AVAILABLE;
+  }
+
+  genCheckCompilerOption = dlsym(dlhCompiler, "GenCheckCompilerOption");
+  if (genCheckCompilerOption == NULL) {
+    dlclose(dlhCompiler);
+    return CL_COMPILER_NOT_AVAILABLE;
+  }
+
+  device->compiler.opaque = dlhCompiler;
+  device->compiler.available = CL_TRUE;
+  device->compiler.compiler_name = "libgbe.so";
+  device->compiler.check_compiler_option = genCheckCompilerOption;
+  device->compiler.build_program = genBuildProgram;
+  device->compiler.compile_program = genCompileProgram;
+  device->compiler.link_program = genLinkProgram;
+  return CL_SUCCESS;
+}
+
+LOCAL cl_int
+cl_compiler_unload_gen(cl_device_id device)
+{
+  assert(device->compiler.available);
+  assert(device->compiler.opaque);
+
+  dlclose(device->compiler.opaque);
+
+  device->compiler.available = CL_FALSE;
+  device->compiler.opaque = NULL;
+  device->compiler.compiler_name = NULL;
+  device->compiler.check_compiler_option = NULL;
+  device->compiler.build_program = NULL;
+  device->compiler.compile_program = NULL;
+  device->compiler.link_program = NULL;
+  return CL_SUCCESS;
+}
-- 
2.7.4