Move OpenCL utility stuff to a separate module

1 files changed, 117 insertions, 0 deletions

diff --git a/src/cl-utils.c b/src/cl-utils.c
new file mode 100644
index 00000000..7d64e690
--- /dev/null
+++ b/src/cl-utils.c
@@ -0,0 +1,117 @@
+/*
+ * cl-utils.c
+ *
+ * OpenCL utility functions
+ *
+ * (c) 2006-2010 Thomas White <taw@physics.org>
+ *
+ * Part of CrystFEL - crystallography with a FEL
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <CL/cl.h>
+
+#include "utils.h"
+
+
+const char *clError(cl_int err)
+{
+	switch ( err ) {
+	case CL_SUCCESS : return "no error";
+	case CL_INVALID_PLATFORM : return "invalid platform";
+	case CL_INVALID_KERNEL : return "invalid kernel";
+	case CL_INVALID_ARG_INDEX : return "invalid argument index";
+	case CL_INVALID_ARG_VALUE : return "invalid argument value";
+	case CL_INVALID_MEM_OBJECT : return "invalid memory object";
+	case CL_INVALID_SAMPLER : return "invalid sampler";
+	case CL_INVALID_ARG_SIZE : return "invalid argument size";
+	case CL_INVALID_COMMAND_QUEUE  : return "invalid command queue";
+	case CL_INVALID_CONTEXT : return "invalid context";
+	case CL_INVALID_VALUE : return "invalid value";
+	case CL_INVALID_EVENT_WAIT_LIST : return "invalid wait list";
+	case CL_MAP_FAILURE : return "map failure";
+	case CL_MEM_OBJECT_ALLOCATION_FAILURE : return "object allocation failure";
+	case CL_OUT_OF_HOST_MEMORY : return "out of host memory";
+	case CL_OUT_OF_RESOURCES : return "out of resources";
+	case CL_INVALID_KERNEL_NAME : return "invalid kernel name";
+	case CL_INVALID_KERNEL_ARGS : return "invalid kernel arguments";
+	default :
+		ERROR("Error code: %i\n", err);
+		return "unknown error";
+	}
+}
+
+
+cl_device_id get_first_dev(cl_context ctx)
+{
+	cl_device_id dev;
+	cl_int r;
+
+	r = clGetContextInfo(ctx, CL_CONTEXT_DEVICES, sizeof(dev), &dev, NULL);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't get device\n");
+		return 0;
+	}
+
+	return dev;
+}
+
+
+static void show_build_log(cl_program prog, cl_device_id dev)
+{
+	cl_int r;
+	char log[4096];
+	size_t s;
+
+	r = clGetProgramBuildInfo(prog, dev, CL_PROGRAM_BUILD_LOG, 4096, log,
+	                          &s);
+
+	STATUS("%s\n", log);
+}
+
+
+cl_program load_program(const char *filename, cl_context ctx,
+                        cl_device_id dev, cl_int *err)
+{
+	FILE *fh;
+	cl_program prog;
+	char *source;
+	size_t len;
+	cl_int r;
+
+	fh = fopen(filename, "r");
+	if ( fh == NULL ) {
+		ERROR("Couldn't open '%s'\n", filename);
+		*err = CL_INVALID_PROGRAM;
+		return 0;
+	}
+	source = malloc(16384);
+	len = fread(source, 1, 16383, fh);
+	fclose(fh);
+	source[len] = '\0';
+
+	prog = clCreateProgramWithSource(ctx, 1, (const char **)&source,
+	                                 NULL, err);
+	if ( *err != CL_SUCCESS ) {
+		ERROR("Couldn't load source\n");
+		return 0;
+	}
+
+	r = clBuildProgram(prog, 0, NULL,
+	                   "-Werror -I"DATADIR"/crystfel/ -cl-no-signed-zeros",
+	                   NULL, NULL);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't build program '%s'\n", filename);
+		show_build_log(prog, dev);
+		*err = r;
+		return 0;
+	}
+
+	free(source);
+	*err = CL_SUCCESS;
+	return prog;
+}