Add extern "C" wrapper to all public headers

Also consistently place the extern "C" before any includes or other
declarations in files that already had it.

Change-Id: Ia316d5be3e509ec76c4a98cfa90ed516073351e0
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

include/spdk/assert.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_ASSERT_H
 #define SPDK_ASSERT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <assert.h>
 
 #define SPDK_CONCAT_(x, y) x##y
@@ -52,4 +56,8 @@
         typedef char SPDK_CONCAT(SPDK_STATIC_ASSERT_, __LINE__)[!!(cond) - 1]
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_ASSERT_H */

include/spdk/barrier.h

@@ -34,7 +34,15 @@
 #ifndef SPDK_BARRIER_H
 #define SPDK_BARRIER_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define spdk_wmb()	__asm volatile("sfence" ::: "memory")
 #define spdk_mb()	__asm volatile("mfence" ::: "memory")
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/file.h

@@ -34,9 +34,17 @@
 #ifndef SPDK_FILE_H
 #define SPDK_FILE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 
 uint64_t spdk_file_get_size(int fd);
 uint32_t spdk_dev_get_blocklen(int fd);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/ioat.h

@@ -38,6 +38,10 @@
 #ifndef SPDK_IOAT_H
 #define SPDK_IOAT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <inttypes.h>
 #include <stdbool.h>
 #include "spdk/pci.h"
@@ -149,4 +153,8 @@ enum spdk_ioat_dma_capability_flags {
  */
 uint32_t spdk_ioat_get_dma_capabilities(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/ioat_spec.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_IOAT_SPEC_H
 #define SPDK_IOAT_SPEC_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <inttypes.h>
 
 #include "spdk/assert.h"
@@ -312,4 +316,8 @@ union spdk_ioat_hw_desc {
 };
 SPDK_STATIC_ASSERT(sizeof(union spdk_ioat_hw_desc) == 64, "incorrect spdk_ioat_hw_desc layout");
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_IOAT_SPEC_H */

include/spdk/mmio.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_MMIO_H
 #define SPDK_MMIO_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <inttypes.h>
 
 #ifdef __x86_64__
@@ -88,4 +92,8 @@ spdk_mmio_write_8(volatile uint64_t *addr, uint64_t val)
 	}
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/nvme.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_NVME_H
 #define SPDK_NVME_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stddef.h>
 #include "spdk/pci.h"
 #include "nvme_spec.h"
@@ -45,9 +49,7 @@
 #define SPDK_NVME_DEFAULT_RETRY_COUNT	(4)
 extern int32_t		spdk_nvme_retry_count;
 
-#ifdef __cplusplus
+
-extern "C" {
-#endif
 
 /** \brief Opaque handle to a controller. Returned by \ref spdk_nvme_probe()'s attach_cb. */
 struct spdk_nvme_ctrlr;

include/spdk/nvme_intel.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_NVME_INTEL_H
 #define SPDK_NVME_INTEL_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 #include <stddef.h>
 
@@ -193,4 +197,8 @@ union spdk_nvme_intel_feat_latency_tracking {
 };
 SPDK_STATIC_ASSERT(sizeof(union spdk_nvme_intel_feat_latency_tracking) == 4, "Incorrect size");
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/nvme_spec.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_NVME_SPEC_H
 #define SPDK_NVME_SPEC_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 #include <stddef.h>
 
@@ -1149,4 +1153,8 @@ enum spdk_nvme_ns_management_type {
 #define SPDK_NVME_IO_FLAGS_FORCE_UNIT_ACCESS (1U << 30)
 #define SPDK_NVME_IO_FLAGS_LIMITED_RETRY (1U << 31)
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/pci.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_PCI_H
 #define SPDK_PCI_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <inttypes.h>
 #include <stddef.h>
 
@@ -63,4 +67,8 @@ int spdk_pci_device_bind_uio_driver(struct spdk_pci_device *dev);
 int spdk_pci_device_switch_to_uio_driver(struct spdk_pci_device *pci_dev);
 int spdk_pci_device_claim(struct spdk_pci_device *dev);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/pci_ids.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_PCI_IDS
 #define SPDK_PCI_IDS
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 
 #define SPDK_PCI_VID_INTEL		0x8086
@@ -47,4 +51,8 @@
  */
 #define SPDK_PCI_CLASS_NVME		0x010802
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_PCI_IDS */

include/spdk/queue.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_QUEUE_H
 #define SPDK_QUEUE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <sys/cdefs.h>
 #include <sys/queue.h>
 
@@ -46,4 +50,8 @@
 #include <spdk/queue_extras.h>
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/string.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_STRING_H
 #define SPDK_STRING_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * sprintf with automatic buffer allocation.
  *
@@ -43,4 +47,8 @@
  */
 char *spdk_sprintf_alloc(const char *format, ...) __attribute__((format(printf, 1, 2)));
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/vtophys.h

@@ -34,12 +34,12 @@
 #ifndef SPDK_VTOPHYS_H
 #define SPDK_VTOPHYS_H
 
-#include <stdint.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#include <stdint.h>
+
 #define SPDK_VTOPHYS_ERROR	(0xFFFFFFFFFFFFFFFFULL)
 
 uint64_t spdk_vtophys(void *buf);