Integrate TLDK with NGINX

Created a clone of nginx (from https://github.com/nginx/nginx)
to demonstrate and benchmark TLDK library integrated with real
world application.
A new nginx module is created and and BSD socket-like API is implemented
on top of native TLDK API.
Note, that right now only minimalistic subset of socket-like API is provided:
- accept
- close
- readv
- recv
- writev
so only limited nginx functionality is available for a moment.

Change-Id: Ie1efe9349a0538da4348a48fb8306cbf636b5a92
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

1 files changed, 126 insertions, 0 deletions

diff --git a/app/nginx/src/os/unix/ngx_shmem.c b/app/nginx/src/os/unix/ngx_shmem.c
new file mode 100644
index 0000000..3ec7cbf
--- /dev/null
+++ b/app/nginx/src/os/unix/ngx_shmem.c
@@ -0,0 +1,126 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#if (NGX_HAVE_MAP_ANON)
+
+ngx_int_t
+ngx_shm_alloc(ngx_shm_t *shm)
+{
+    shm->addr = (u_char *) mmap(NULL, shm->size,
+                                PROT_READ|PROT_WRITE,
+                                MAP_ANON|MAP_SHARED, -1, 0);
+
+    if (shm->addr == MAP_FAILED) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "mmap(MAP_ANON|MAP_SHARED, %uz) failed", shm->size);
+        return NGX_ERROR;
+    }
+
+    return NGX_OK;
+}
+
+
+void
+ngx_shm_free(ngx_shm_t *shm)
+{
+    if (munmap((void *) shm->addr, shm->size) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "munmap(%p, %uz) failed", shm->addr, shm->size);
+    }
+}
+
+#elif (NGX_HAVE_MAP_DEVZERO)
+
+ngx_int_t
+ngx_shm_alloc(ngx_shm_t *shm)
+{
+    ngx_fd_t  fd;
+
+    fd = open("/dev/zero", O_RDWR);
+
+    if (fd == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "open(\"/dev/zero\") failed");
+        return NGX_ERROR;
+    }
+
+    shm->addr = (u_char *) mmap(NULL, shm->size, PROT_READ|PROT_WRITE,
+                                MAP_SHARED, fd, 0);
+
+    if (shm->addr == MAP_FAILED) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "mmap(/dev/zero, MAP_SHARED, %uz) failed", shm->size);
+    }
+
+    if (close(fd) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "close(\"/dev/zero\") failed");
+    }
+
+    return (shm->addr == MAP_FAILED) ? NGX_ERROR : NGX_OK;
+}
+
+
+void
+ngx_shm_free(ngx_shm_t *shm)
+{
+    if (munmap((void *) shm->addr, shm->size) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "munmap(%p, %uz) failed", shm->addr, shm->size);
+    }
+}
+
+#elif (NGX_HAVE_SYSVSHM)
+
+#include <sys/ipc.h>
+#include <sys/shm.h>
+
+
+ngx_int_t
+ngx_shm_alloc(ngx_shm_t *shm)
+{
+    int  id;
+
+    id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT));
+
+    if (id == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "shmget(%uz) failed", shm->size);
+        return NGX_ERROR;
+    }
+
+    ngx_log_debug1(NGX_LOG_DEBUG_CORE, shm->log, 0, "shmget id: %d", id);
+
+    shm->addr = shmat(id, NULL, 0);
+
+    if (shm->addr == (void *) -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmat() failed");
+    }
+
+    if (shmctl(id, IPC_RMID, NULL) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "shmctl(IPC_RMID) failed");
+    }
+
+    return (shm->addr == (void *) -1) ? NGX_ERROR : NGX_OK;
+}
+
+
+void
+ngx_shm_free(ngx_shm_t *shm)
+{
+    if (shmdt(shm->addr) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
+                      "shmdt(%p) failed", shm->addr);
+    }
+}
+
+#endif