Merge pull request #28 from JoeyJiao/mine_android

Port for Android

1 files changed, 81 insertions, 0 deletions

diff --git a/android-ashmem.h b/android-ashmem.h
new file mode 100644
index 00000000..a787c04b
--- /dev/null
+++ b/android-ashmem.h
@@ -0,0 +1,81 @@
+#ifndef _ANDROID_ASHMEM_H
+#define _ANDROID_ASHMEM_H
+
+#include <fcntl.h>
+#include <linux/shm.h>
+#include <linux/ashmem.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#if __ANDROID_API__ >= 26
+#define shmat bionic_shmat
+#define shmctl bionic_shmctl
+#define shmdt bionic_shmdt
+#define shmget bionic_shmget
+#endif
+ #include <sys/shm.h>
+#undef shmat
+#undef shmctl
+#undef shmdt
+#undef shmget
+#include <stdio.h>
+
+#define ASHMEM_DEVICE	"/dev/ashmem"
+
+static inline int shmctl(int __shmid, int __cmd, struct shmid_ds *__buf)
+{
+		int ret = 0;
+		if (__cmd == IPC_RMID) {
+			int length = ioctl(__shmid, ASHMEM_GET_SIZE, NULL);
+			struct ashmem_pin pin = {0, length};
+			ret = ioctl(__shmid, ASHMEM_UNPIN, &pin);
+			close(__shmid);
+		}
+
+		return ret;
+}
+
+static inline int shmget (key_t __key, size_t __size, int __shmflg)
+{
+	int fd,ret;
+	char ourkey[11];
+
+	fd = open(ASHMEM_DEVICE, O_RDWR);
+	if (fd < 0)
+		return fd;
+
+	sprintf(ourkey,"%d",__key);
+	ret = ioctl(fd, ASHMEM_SET_NAME, ourkey);
+	if (ret < 0)
+		goto error;
+
+	ret = ioctl(fd, ASHMEM_SET_SIZE, __size);
+	if (ret < 0)
+		goto error;
+
+	return fd;
+
+error:
+	close(fd);
+	return ret;
+}
+
+static inline void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
+{
+  int size;
+  void *ptr;
+  
+  size = ioctl(__shmid, ASHMEM_GET_SIZE, NULL);
+  if (size < 0) {
+    return NULL;
+  }
+
+  ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, __shmid, 0);
+  if (ptr == MAP_FAILED) {
+    return NULL;
+  }
+  
+  return ptr;
+}
+
+#endif